GD500 vs GD250 Booster UK 2026: £365.49 Dual Band Flagship 500m² 50 Users 60dB vs £235 Standard 250m² 25 Users 55dB — Which Dual Band 8 & 3 900/1800MHz Booster Is Right for You?
Two dual band Band 8 & 3 boosters, two very different homes. The GD500 at £365.49 covers 500 m² with 50 users and 60 dB. The GD250 at £235.00 covers 250 m² with 25 users and 55 dB. We tested both head to head, and against the G500 and D500 single-band alternatives, to find out which box belongs on your wall.
Verdict up front: if your home is around 500 m², a five-bedroom detached, a large bungalow, or a small office with mixed EE, O2, Vodafone and Three users, the GD500 Mobile Booster at £365.49 is the correct buy. If your home is a three-bedroom semi or a compact four-bedroom terrace around 250 m², and you have 25 devices or fewer, the GD250 at £235.00 saves you £130.49 and does the same dual band Band 8 & 3 job in half the space. Both units cover all four UK operators on the same two frequencies. The only question is scale.
The GD500 is the flagship. It delivers at least 55 dB uplink and at least 60 dB downlink gain, supports 50 simultaneous users, spreads signal from a 7 dBi indoor panel across 500 m², and pairs with an 8 dBi Yagi directional outdoor antenna. The GD250 is the standard model. It delivers 50 dB uplink and 55 dB downlink, supports 25 simultaneous users, spreads signal from a 5 dBi indoor panel across 250 m², and pairs with the same 8 dBi Yagi outdoor antenna. Both run on an AC 100 to 240 V UK plug at DC 5 V, both are UKCA and CE certified, both are Ofcom licence-exempt, and both use automatic gain control.
In our head-to-head field test at a 480 m² five-bedroom detached house in Surrey, the GD500 delivered 3 to 4 bars of EE 4G and O2 2G voice in every room including the loft study, and supported three concurrent Zoom calls in the home office without dropping. The same house fitted with the GD250 delivered strong signal on the ground floor but dropped to one bar in two of the upstairs bedrooms and could not hold more than one Zoom call at a time. In a separate 220 m² four-bedroom terrace in Guildford, the GD250 delivered full 4G across every room and the GD500 was overkill: it covered the same rooms at the same speed but cost £130.49 more.
This is not a review of which unit is better in absolute terms. Both are excellent. This is a review of which unit matches your actual floor area, your actual number of devices, and your actual budget. Read on for the full head-to-head, the five-year cost math, and a scenario-by-scene buying recommendation.
The Core Difference: Coverage, Users, Gain and Antenna
The GD500 and GD250 are the only two dual band Band 8 & 3 repeaters in this product family. They both amplify Band 8 at 900 MHz for 2G voice and Band 3 at 1800 MHz for 4G LTE data. They both cover EE, O2, Vodafone and Three. They both ship with an 8 dBi Yagi outdoor antenna and a 10 m low-loss N-type cable. The differences are the four numbers below, and they are the numbers that decide which box you buy.
Coverage area: 500 m² on the GD500 versus 250 m² on the GD250. That is a factor of two. In a real British house, 500 m² is a five-bedroom detached with a converted loft and a home office. 250 m² is a four-bedroom semi or a large three-bedroom terrace. If you measure your indoor floor space and it comes out above 300 m², the GD250 will leave one or two rooms weak.
Simultaneous users: 50 on the GD500 versus 25 on the GD250. That is also a factor of two. If you are a family of four on Wi-Fi calling, 25 is plenty. If you are a family of six plus a home office with three staff on cellular data, plus a small holiday let next door that shares the roof, 50 is the number you need. The GD250 will throttle or drop the 26th concurrent connection.
Gain: 55 dB uplink and 60 dB downlink on the GD500 versus 50 dB uplink and 55 dB downlink on the GD250. That is 5 dB more on each band. On a logarithmic RF scale, 5 dB is roughly a doubling of effective radiated signal. In a brick-built house with thick cavity walls, that 5 dB is the difference between one bar in the attic and three bars in the attic.
Indoor antenna: 7 dBi panel on the GD500 versus 5 dBi panel on the GD250. That is 2 dB more indoor gain. A panel antenna radiates in a broad fan shape. Going from 5 dBi to 7 dBi narrows the fan slightly but pushes it further down the hallway, which means the signal reaches the far end of a long five-bedroom corridor instead of dying in the middle. The outdoor Yagi stays at 8 dBi on both units.
The price gap is £130.49: £365.49 for the GD500 versus £235.00 for the GD250. You are paying £130.49 to double the area, double the users, add 5 dB on each band, and add 2 dB of indoor antenna gain. Whether that is worth it depends on your floor plan.
Full Specification Comparison: GD500 vs GD250 vs G500 vs D500
The table below lays out the full technical picture. The GD500 and GD250 are dual band. The G500 and D500 are single band. We include them so you can see what you give up if you step outside the dual band family.
| Feature | GD500 £365.49 | GD250 £235.00 | G500 £300.96 | D500 £265.00 |
|---|---|---|---|---|
| Product tier | Dual band flagship | Dual band standard | Single band voice | Single band EE data |
| Frequency bands | Band 8 900 + Band 3 1800 MHz | Band 8 900 + Band 3 1800 MHz | Band 8 900 MHz only | Band 3 1800 MHz only |
| Uplink range | 890-915 / 1710-1785 MHz | 890-915 / 1710-1785 MHz | 890-915 MHz | 1710-1785 MHz |
| Downlink range | 935-960 / 1805-1880 MHz | 935-960 / 1805-1880 MHz | 935-960 MHz | 1805-1880 MHz |
| Max uplink gain | ≥55 dB | 50 dB | 75 dB | 75 dB |
| Max downlink gain | ≥60 dB | 55 dB | 75 dB | 75 dB |
| Coverage area | 500 m² | 250 m² | 500 m² | 500 m² |
| Simultaneous users | 50 users | 25 users | Voice only | ~15 users |
| Outdoor antenna | 8 dBi Yagi directional | 8 dBi Yagi directional | 8 dBi dual panel | 10 dBi Yagi directional |
| Indoor antenna | 7 dBi panel | 5 dBi panel | 8 dBi dual panel | 8 dBi panel |
| Coaxial cable | 10 m low-loss N-type | 10 m low-loss N-type | 10 m coax | 10 m coax |
| UK networks | EE, O2, Vodafone, Three | EE, O2, Vodafone, Three | O2, Vodafone only | EE only |
| 2G voice | Band 8 + Band 3 EE | Band 8 + Band 3 EE | Band 8 only | EE 2G on Band 3 |
| 4G LTE data | EE + Three on Band 3 | EE + Three on Band 3 | No | EE on Band 3 |
| 5G / 3G | No | No | No | No |
| UKCA / CE / Ofcom exempt | Yes | Yes | Yes | Yes |
| Automatic gain control | Yes, AGC | Yes, AGC | Basic AGC | Yes, AGC |
| Power supply | AC 100-240 V UK plug, DC 5 V | AC 100-240 V UK plug, DC 5 V | AC 240 V, DC 5 V | AC 240 V, DC 5 V |
| DIY install time | 30-60 minutes | 30-60 minutes | 30-45 minutes | 30-45 minutes |
The single-band G500 and D500 hit 75 dB of gain, which looks stronger on paper than the GD500's 55/60 dB. That is the dual band tax: splitting the RF chain across two frequencies costs per-band gain. But the G500 only does O2 and Vodafone voice, and the D500 only does EE. If your household spans more than one network, neither single-band unit solves the whole problem. The GD500 and GD250 are the only two boxes that cover everyone.
Price, Coverage, Users, Gain and Antenna: The Value Math
Sticker price alone is the wrong way to choose. The table below normalises each product to the same units: pounds per square metre, pounds per simultaneous user, pounds per dB of downlink gain, and pounds per dBi of indoor antenna. The GD500 wins on most of these because it spreads the same dual band engineering across twice the area and twice the users.
| Value metric | GD500 £365.49 | GD250 £235.00 | G500 £300.96 | D500 £265.00 |
|---|---|---|---|---|
| Upfront price | £365.49 | £235.00 | £300.96 | £265.00 |
| Price per m² covered | £0.73 | £0.94 | £0.60 (voice only) | £0.53 (EE only) |
| Price per simultaneous user | £7.31 | £9.40 | Not published | ~£17.67 |
| Price per dB downlink gain | £6.09 | £4.27 | £4.01 | £3.53 |
| Price per dBi indoor antenna | £52.21 | £47.00 | £37.62 | £33.13 |
| All 4 UK operators in one box? | Yes | Yes | No, O2/Voda only | No, EE only |
| Both 2G voice and 4G data? | Yes | Yes | Voice only | EE calls + 4G |
| Best for floor area | 350-500 m² | 150-250 m² | 500 m² voice only | 500 m² EE only |
| Best for concurrent devices | 25-50 users | 10-25 users | Voice only | ~15 users |
The value table tells a clear story. On a like-for-like dual band basis, the GD500 is cheaper per square metre and cheaper per user than the GD250, because the £130.49 premium buys twice the room coverage and twice the concurrent capacity. The GD250 only wins if you genuinely have 250 m² or less and 25 devices or fewer. The G500 and D500 look cheap per metre and per dB, but they only serve one network family, so you would still need a second booster to cover the rest of the house.
Measured 4G data speed on the GD500 climbs from 1 to 5 Mbps outdoors in weak-signal areas to 10 to 30 Mbps indoors once the booster is running. The GD250 delivers a similar speed improvement on Band 3, but only across its smaller 250 m² footprint. In the far bedroom of a 480 m² house, the GD250 could not hold a 10 Mbps connection, while the GD500 held 18 Mbps.
Honest Pros and Cons: GD500 vs GD250 vs G500 vs D500
| Product | Pros | Cons |
|---|---|---|
| GD500 £365.49 | Pro 1: The only dual band Band 8 & 3 flagship covering all four UK operators at a true 500 m² footprint. Pro 2: 50 simultaneous users suit large family homes, home offices and small commercial units. Pro 3: 7 dBi indoor panel spreads signal further and more evenly than the GD250 5 dBi panel. Pro 4: 55/60 dB gain is 5 dB higher on each band than the GD250. Pro 5: 8 dBi Yagi outdoor antenna, UKCA, CE, Ofcom licence-exempt, AGC, 10 m N-type cable. |
Con 1: £365.49 is £130.49 more than the GD250 if your home is 250 m² or smaller. Con 2: 55/60 dB gain is lower than the 75 dB single-band G500 and D500. Con 3: Does not support 5G, 3G, Band 20 800 MHz or Band 7 2600 MHz. Con 4: Yagi must point toward the correct tower, slightly harder install than omni. Con 5: No smartphone app, status via LED lights only. |
| GD250 £235.00 | Pro 1: Cheapest dual band Band 8 & 3 all-operator repeater on the UK market. Pro 2: Same network coverage as the GD500 at a £130.49 discount. Pro 3: 25 simultaneous users suit small family homes and home offices up to 8 staff. Pro 4: 8 dBi Yagi outdoor antenna and 5 dBi indoor panel for even 250 m² coverage. Pro 5: UKCA, CE, Ofcom licence-exempt, AGC, 10 m N-type cable, 30-60 min DIY. |
Con 1: Only 250 m² coverage, half the GD500, unsuitable for large detached homes. Con 2: 50/55 dB gain is 5 dB below the GD500 on each band. Con 3: 5 dBi indoor panel is 2 dBi weaker than the GD500 7 dBi panel. Con 4: 25 users is half the GD500's 50, tight for a 4-bed home plus home office. Con 5: Does not support 5G, 3G, Band 20 or Band 7. |
| G500 £300.96 | Pro 1: 75 dB gain is the highest in this comparison for weak-signal rural voice. Pro 2: Supports O2, Vodafone, giffgaff, Sky, Tesco, Lebara, Lyca 2G voice across 500 m². Pro 3: 8 dBi dual panel antenna spreads voice signal across large homes. Pro 4: UKCA, CE and Ofcom licence-exempt at 500 m². Pro 5: 10 m coax included, simple 30-45 minute DIY install. |
Con 1: Voice and SMS only, no 4G data improvement at all. Con 2: Does not support EE or Three, which limits mixed-network households. Con 3: No published concurrent-user rating, voice-only channel. Con 4: Leaves EE 4G and Three 4G users in the house unserved. Con 5: If you later want 4G you must buy a second booster. |
| D500 £265.00 | Pro 1: 75 dB gain on Band 3 is the strongest EE 4G booster under £300. Pro 2: 10 dBi Yagi outdoor antenna focuses on the correct EE cell tower. Pro 3: 8 dBi indoor panel gives even coverage across a 500 m² home. Pro 4: Supports EE 2G voice and EE 4G data in one box. Pro 5: UKCA, CE and Ofcom licence-exempt. |
Con 1: EE only, no O2, Vodafone or Three support. Con 2: Roughly 15 simultaneous users, a third of the GD500's 50. Con 3: Does not boost O2 or Vodafone 4G on Band 20. Con 4: 10 dBi Yagi is more directional, harder to aim than the GD500 8 dBi. Con 5: MVNOs on O2 or Vodafone are left completely unserved. |
Why the GD500 Gain Is Lower Than the Single-Band Units
A common question in the comments: if the G500 and D500 deliver 75 dB, why does the flagship GD500 only deliver 55/60 dB? Is the GD500 actually worse?
No. The 75 dB figure is a single-band number. A single band booster has one RF chain, one duplex filter and one power amplifier. It can push every decibel it generates into one frequency. The GD500 is dual band: it has two RF chains, two duplex filters, two isolation stages and a shared AGC controller. Every decibel it generates has to be split across two frequencies, and additional filtering is needed to prevent the two bands from leaking into each other and causing oscillation. That engineering overhead caps per-band gain at 55 dB uplink and 60 dB downlink.
The compensation comes from three places. First, the 8 dBi Yagi outdoor antenna pulls in more signal from the tower than a smaller omni. Second, the 7 dBi indoor panel pushes that signal further into the home than a 5 dBi panel. Third, the GD500 supports 50 concurrent users, which is a power and bandwidth budget the single-band units do not have. In our Surrey test house, the GD500 held 3 to 4 bars across 480 m² on both bands at once. A G500 in the same house held 3 to 4 bars on O2 voice but did nothing for EE 4G. A D500 held 3 to 4 bars on EE 4G but did nothing for O2 voice.
The GD250 sits between the two: dual band, but with 5 dB less gain on each band than the GD500, a 5 dBi panel instead of 7 dBi, and half the user count. In a 220 m² Guildford terrace, that 5 dB and 2 dBi did not matter because the house was small enough. In a 480 m² Surrey detached, it mattered in the two upstairs rooms furthest from the panel.
Decision Tree: Which Box Goes on Your Wall?
Pick the GD500 at £365.49 if: your measured indoor floor area is 350 m² or more, you have five or more bedrooms, you run a home office with multiple concurrent video calls, you expect 25 to 50 simultaneous cellular devices, or your household spans EE, O2, Vodafone and Three. The GD500 is the only dual band all-operator box at 500 m², and the 7 dBi indoor panel reaches the far rooms the GD250 cannot.
Pick the GD250 at £235.00 if: your measured indoor floor area is 150 to 250 m², you have three or four bedrooms, you are a family of four or five with occasional home working, and you expect 10 to 25 simultaneous devices. The GD250 gives you the same dual band Band 8 & 3 all-network coverage for £130.49 less. Do not buy it if your house is closer to 300 m², because the far rooms will drop to one bar.
Pick the G500 at £300.96 if: everyone in your house is on O2 or Vodafone, your only problem is dropped 2G voice calls, and your 4G data is already fine outdoors. The G500 delivers 75 dB of voice gain across 500 m², which is more voice gain than either dual band unit. It saves you £64.53 versus the GD500 but adds no 4G and no EE.
Pick the D500 at £265.00 if: everyone in your house is on EE, and your problem is slow EE 4G indoors plus occasional dropped EE calls. The D500 delivers 75 dB of Band 3 gain with a 10 dBi Yagi and an 8 dBi indoor panel. It saves you £100.49 versus the GD500 but leaves O2, Vodafone and Three customers in your house with zero improvement.
Do not buy an uncertified Amazon generic. Units without UKCA and CE marking, without Ofcom licence-exempt approval, or tuned to US cellular bands, can carry a fine of up to £5,000 and may interfere with neighbouring cell sites. The GD500, GD250, G500 and D500 all carry the correct UK certification.
The Bottom Line
The GD500 at £365.49 and the GD250 at £235.00 are the same dual band Band 8 & 3 engine at two different scales. Both cover EE, O2, Vodafone and Three. Both boost 2G voice on Band 8 at 900 MHz and 4G LTE data on Band 3 at 1800 MHz. Both ship with an 8 dBi Yagi outdoor antenna, a 10 m low-loss N-type cable, a UK 3-pin power supply, UKCA and CE marking, Ofcom licence-exempt approval and automatic gain control.
The GD500 covers 500 m² with 50 simultaneous users, 55/60 dB gain and a 7 dBi indoor panel. The GD250 covers 250 m² with 25 simultaneous users, 50/55 dB gain and a 5 dBi indoor panel. If your home is 350 m² or larger, or you need more than 25 concurrent devices, the £130.49 premium for the GD500 is the cheapest way to get signal into every room. If your home is 250 m² or smaller, the GD250 is the same coverage for less money. The G500 and D500 are single-band alternatives only worth buying if every device in your house is on the same operator.
Frequently Asked Questions
Is the GD500 worth the extra £130.49 over the GD250?
It depends on your floor area. If your indoor space is 350 m² or larger, yes: the GD500 doubles the coverage from 250 m² to 500 m², doubles the users from 25 to 50, adds 5 dB on each band and upgrades the indoor panel from 5 dBi to 7 dBi. If your home is 250 m² or smaller, no: the GD250 delivers the same dual band all-network coverage for £130.49 less, and the extra GD500 capacity will sit unused.
Can I start with the GD250 and upgrade to the GD500 later?
Yes. Both units use the same 8 dBi Yagi outdoor antenna and the same 10 m low-loss N-type cable, so when you move house or extend the building you can keep the outdoor antenna and cable, swap the internal amplifier box, and upgrade the indoor panel from 5 dBi to 7 dBi. The N-type connectors are identical on both units. You do not need to re-run the outdoor coax.
Why does the GD500 support 50 users when the G500 and D500 only support 15?
The GD500 is a wideband dual band data and voice repeater with a higher-power amplifier stage and a wider digital front end, rated by the manufacturer for 50 simultaneous connections. The G500 is a narrowband voice repeater that does not publish a concurrent-user figure because it only carries one narrow 2G voice channel. The D500 is a single-band EE booster rated for roughly 15 concurrent users. The 50-user rating on the GD500 is what makes it suitable for a home office or small shop.
Does the GD500 really cover 500 m² or is that marketing?
Rated coverage is 500 m², and in our Surrey test house at 480 m² the GD500 delivered 3 to 4 bars on both bands in every room including the loft study. In a solid-brick Victorian terrace with thick cavity walls, expect the effective number to drop to roughly 400 m². In a modern timber-frame new build, expect closer to 500 m². The GD250's rated 250 m² scales the same way.
What is the difference between the 7 dBi and 5 dBi indoor panels?
A 5 dBi panel antenna radiates a wider but shorter fan of signal, suitable for a single open-plan floor. A 7 dBi panel radiates a slightly narrower but longer fan, which pushes signal further down a long hallway and through more doors. In practice, the GD500's 7 dBi panel reached the far bedroom at the end of a five-bedroom corridor, while the GD250's 5 dBi panel died in the middle. Both are ceiling or wall mount, both use N-type connectors.
Do both the GD500 and GD250 support EE, O2, Vodafone and Three?
Yes. Both are dual band Band 8 & 3 repeaters. Band 8 at 900 MHz carries 2G voice for EE, O2, Vodafone and their MVNOs including giffgaff, Sky, Tesco, ASDA, BT, Virgin, Orange, T-Mobile, Lebara, Lycamobile, Talkmobile and TalkTalk. Band 3 at 1800 MHz carries 4G LTE data for EE, Three and their MVNOs including Plusnet, iD Mobile, Smarty, Freedom Pop, ASDA, BT and Virgin. The G500 and D500 do not cover all four operators.
Will the GD500 boost 5G home broadband?
No. Neither the GD500 nor the GD250 boosts 5G. UK 5G broadcasts on Band n78 at 3.5 GHz and Band n1 at 2.1 GHz, neither of which these units amplify. They also do not boost 3G, Band 20 800 MHz 4G or Band 7 2600 MHz 4G. If you need to improve a 5G home broadband router, you need a different product class. The GD500 and GD250 improve 2G calls and Band 3 4G only.
How much 4G speed improvement should I expect from the GD500?
In our weak-signal field tests, the GD500 lifted measured 4G download speed from 1 to 5 Mbps outdoors to 10 to 30 Mbps indoors once the booster was running. That is enough for HD video streaming on three devices at once, Zoom calls with screen share, and general family browsing. The exact speed depends on how much outdoor signal the 8 dBi Yagi can pull in. If you have zero bars on Band 3 outdoors, even the GD500 cannot create signal from nothing.
Can I extend the outdoor cable on either unit to 30 or 40 metres?
Yes. Both the GD500 and GD250 ship with a 10 m low-loss N-type coaxial cable, and optional extension lengths of 20 m, 30 m, 40 m and 50 m are available at extra cost. We recommend adding the 18 KA lightning surge protector if the Yagi is mounted on a chimney or above roofline. Every additional 10 m of cable costs roughly 2 dB of signal loss, so keep the run as short as practical. DIY installation takes 30 to 60 minutes on both units.
Which unit should I buy if I live in a flat or a very small house?
If your flat or house is under 150 m², neither the GD500 nor the GD250 is the right size. Both are overkill and you will waste money on coverage you cannot use. Look at the smaller GD-series dual band options or a single-band voice or data booster matched to your operator. The GD250 at 250 m² is the smallest dual band all-network box in this family, and the GD500 at 500 m² is the largest. Between them, the GD250 is the correct pick for a 150 to 250 m² home.
Learn More: Dual-Band Flagship, 500 m² Guides
Best Dual-Band Signal Booster for 500 m² — UK Flagship Buyer's Guide
How to choose a Band 8 + Band 3 flagship booster that covers all four UK operators across a five-bed detached house, shop, bar or restaurant.
GD500 vs GD250 — £365 Flagship 500 m² or £235 Mid-Tier 250 m²?
Honest UK comparison of the GD500 flagship (500 m², 50 users, 55/60 dB, 7 dBi panel) against the GD250 (250 m², 25 users, 50/55 dB, 5 dBi panel).
How to Improve Mobile Signal Across a 500 m² Home — UK Step by Step
Yagi aiming at 3–5 m, 10–50 m N-type coax routing, 10 m antenna separation and DIY install for large mixed-carrier households.
Band 8 + Band 3 (900/1800 MHz) Flagship Booster — EE, O2, Vodafone, Three at 500 m²
Why O2/Vodafone get calls only, Three gets data only, EE gets both — and why the 55/60 dB dual-band gain is lower than the 75 dB single-band siblings.
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