D300 vs D250 EE Signal Booster UK 2026: £183.82 300m² 72dB Panel Antenna vs £169.00 250m² 70dB Omni Antenna — Which D-Series EE Booster Is Right for You?
Choosing between the D300 at £183.82 and the D250 at £169.00 is the most common question we get from EE customers shopping for a Band 3 1800 MHz signal booster. Both belong to the D-series, both are tuned to EE Band 3 for voice and 4G, and the price gap is only £14.82.
Verdict up front: if your home or office is between 250 and 320 m², choose the D300 at £183.82. The extra £14.82 buys you 50 m² more coverage, 2 dB more gain, a directional panel indoor antenna that focuses signal where you need it, a quieter 3.5 dB noise figure that delivers cleaner calls and faster data, five more simultaneous user slots, and explicit support for Virgin Mobile and TPO. If your space is between 180 and 250 m², the D250 at £169.00 is sufficient and saves you £14.82.
We also compare both D-series units against the C250 at £199.99, which is tuned to O2 and Vodafone Band 20 at 800 MHz for 4G data only, and against the discontinued EE Sure Signal femtocell.
Why the D-Series Exists in Two Tiers
The D-series is our product line dedicated exclusively to EE Band 3 at 1800 MHz. EE is the only major UK operator that broadcasts both 2G voice calls and 4G LTE data on the same frequency at 1800 MHz. This means a single Band 3 repeater box can fix both dropped calls and slow data at the same time.
We built two tiers because not every EE customer lives in the same size property. The D250 was designed for the typical 2 to 3 bedroom semi-detached house, which in the UK averages 140 to 200 m². A 250 m² rated booster gives that property a comfortable margin of coverage in every room.
The D300 was designed for the 4 bedroom detached house, the large converted barn, the Edwardian terrace with a rear extension, or the small professional office. These properties run between 240 and 320 m², and a 250 m² rated unit leaves the rear rooms and the upstairs bedrooms on the edge of the coverage bubble.
The price difference between the two tiers is only £14.82. That is a surprisingly small gap for a meaningful step up in coverage, gain and indoor antenna technology.
Side-by-Side Specification Comparison
Here is the full technical picture across all four products in this comparison: the D300, the D250, the C250 and the EE Sure Signal alternative. Numbers come from manufacturer datasheets and our own lab measurements.
| Feature | D300 £183.82 | D250 £169.00 | C250 £199.99 | EE Sure Signal |
|---|---|---|---|---|
| Product type | EE Band 3 voice + 4G | EE Band 3 voice + 4G | O2/Voda Band 20 4G only | EE 3G femtocell |
| Frequency band | Band 3 1800 MHz | Band 3 1800 MHz | Band 20 800 MHz | 3G only |
| Max gain | 72 dB | 70 dB | 72 dB | N/A, broadband |
| Output power | 20 dBm | 20 dBm | 20 dBm | N/A |
| Noise figure | 3.5 dB | 4 dB | 3.5 dB | N/A |
| Coverage area | 300 m² | 250 m² | 250 m² | 10 to 15 m² |
| UKCA / CE mark | Yes | Yes | Yes | N/A |
| Ofcom licence-exempt | Yes | Yes | Yes | Discontinued |
| Supported networks | EE, BT, ASDA, Virgin, Orange, T-Mobile, TPO | EE, BT, ASDA, Orange, T-Mobile | O2, Vodafone, TalkTalk | EE only, 3G |
| Outdoor antenna | 9 dBi Yagi, 10 m coax | 8 dBi Yagi, 10 m coax | 8 dBi Yagi, 10 m coax | None, broadband |
| Indoor antenna | 6 dBi directional panel | 5 dBi omni | 5 dBi panel | Built-in 3 dBi |
| Power consumption | 15 W | 12 W | 15 W | 8 W |
| Unit size / weight | 200×140×35 mm / 500 g | 180×130×30 mm / 400 g | 190×130×35 mm / 450 g | 120×120×30 mm / 300 g |
| Automatic gain control | AGC | AGC | AGC | N/A |
| Simultaneous users | Up to 30 | Up to 25 | Up to 25 | Up to 4 |
| Expandable with extra panels | Yes | Optional | N/A | No |
Three rows tell the whole story. First, the coverage row: the D300 covers 300 m² versus the D250 250 m², which is a 20 percent increase. Second, the indoor antenna row: the D300 ships with a 6 dBi directional panel, while the D250 ships with a 5 dBi omni. A panel antenna is not just 1 dBi stronger, it also focuses the signal in a direction of your choice. Third, the supported networks row: the D300 explicitly lists Virgin Mobile and TPO, while the D250 page focuses on EE, BT Mobile and ASDA Mobile.
The £14.82 Upgrade: What You Actually Get
Let us break down exactly what the £14.82 price difference buys you when you step up from the D250 to the D300.
More Coverage: 300 m² versus 250 m²
The D300 covers 300 m², which is 50 m² more than the D250. That extra 50 m² is the difference between covering a 4 bedroom detached house comfortably and leaving the rear extension, the garage conversion or the upstairs main bedroom on the edge of the coverage bubble. In our Amersham test with the D250, the rear home office received 2 bars. With the D300 in the same location, the same room received 4 bars.
More Gain: 72 dB versus 70 dB
The D300 delivers 72 dB of maximum gain, which is 2 dB more than the D250 70 dB. Two dB may sound small, but in RF engineering it is a meaningful step. In weak-signal rural areas where the outdoor EE signal is already marginal, that extra 2 dB can be the difference between pulling in a usable signal and not pulling in anything at all.
Better Indoor Antenna: 6 dBi Panel versus 5 dBi Omni
This is the most important upgrade. The D300 includes a 6 dBi directional panel indoor antenna. The D250 includes a 5 dBi omni indoor antenna. A directional panel antenna focuses the boosted signal in a 120 to 150 degree horizontal beam, rather than radiating equally in all directions. This means you can mount the panel antenna high on a wall in a central hallway and aim it toward the living room, the kitchen or the home office.
Quieter Amplifier: 3.5 dB versus 4 dB Noise Figure
The D300 has a noise figure of 3.5 dB, while the D250 has a noise figure of 4 dB. A lower noise figure means the amplifier adds less of its own electronic noise when it boosts the weak incoming EE signal. In practice this translates to cleaner voice calls with less static, fewer dropped connections at the edge of coverage, and slightly faster 4G data throughput.
More User Capacity: 30 versus 25 Simultaneous Users
The D300 supports up to 30 simultaneous users, while the D250 supports up to 25. For a family home this difference is rarely noticeable. For a small office, a medium shop or a village pub, the extra five user slots can matter during busy periods.
Virgin Mobile and TPO Support
The D300 explicitly lists Virgin Mobile and TPO among its supported networks for both voice and 4G data. The D250 product page focuses on EE, BT Mobile and ASDA Mobile. If you are a Virgin Mobile customer running on EE infrastructure, the D300 is the safer choice because it is certified and tested for your SIM.
Expandable Coverage
The D300 is designed to work with additional indoor panel antennas sold separately. Each extra panel covers roughly 100 to 150 m² and requires a signal splitter. This is the pathway to covering a two-storey or three-storey home where you want dedicated coverage upstairs and downstairs. The D250 can also accept extra antennas, but the D300 20 dBm output provides more headroom for splitting.
When the D250 Is the Right Choice
The D250 at £169.00 is not a worse product. It is a correctly sized product for a smaller property. Here is when you should choose the D250 over the D300.
Your Home Is 2 to 3 Bedrooms
If you live in a typical UK semi-detached or terraced house measuring 140 to 220 m², the D250 250 m² rating gives you a comfortable margin. You do not need 300 m² of coverage.
You Will Not Need to Expand
The D250 is a single-room or single-floor solution. If you know you will never need to add extra panel antennas for a second floor, the D250 is sufficient.
Your Budget Is Exactly £169 to Spend
The D250 at £169.00 is the entry point into genuine EE Band 3 voice and 4G boosting. If £14.82 makes a real difference to your budget, the D250 delivers 90 percent of the D300 performance for 92 percent of the price.
When the D300 Is the Right Choice
The D300 at £183.82 is the better choice for the following scenarios.
Your Home Is 4 Bedrooms or Larger
If you live in a detached house, a converted barn, an Edwardian terrace with a rear extension or a property over 250 m², the D300 300 m² rating is the correct fit. The D250 will leave the far rooms on the edge of coverage.
You Need a Panel Antenna
If you want to aim the boosted signal toward specific rooms rather than broadcasting in every direction, the D300 6 dBi panel is the upgrade you need.
You Plan to Expand to Multiple Floors
If you want to add a second indoor panel antenna upstairs later, the D300 is the better starting point because of its higher output power and expandable design.
You Are on Virgin Mobile or TPO
If your SIM is Virgin Mobile or TPO, the D300 is explicitly certified for your network.
You Run a Small Office or Shop
With 30 simultaneous users, the D300 has enough capacity for a small professional office, a medium shop or a village pub during busy trading.
How the D300 Compares to the C250
The C250 at £199.99 looks similar to the D300 on paper: it also delivers 72 dB of gain, 20 dBm output power and 3.5 dB noise figure. But there is one critical difference.
The C250 is tuned to Band 20 at 800 MHz, which is the frequency O2 and Vodafone use for 4G LTE data. It does not support EE Band 3 at 1800 MHz. It also does not support voice calls on any UK network because Band 20 at 800 MHz is a data-only frequency for O2 and Vodafone.
If you are an EE customer, the C250 will do absolutely nothing for your signal. If you are an O2 or Vodafone customer who needs 4G data boost but not voice, the C250 is the correct unit. If you are an EE customer who needs both voice calls and 4G data on the same Band 3 carrier, the D300 at £183.82 is actually £16.17 cheaper than the C250 at £199.99 and does a completely different job.
Do not confuse the D-series with the C-series. The D300 and D250 are EE Band 3 1800 MHz products. The C250 is an O2 and Vodafone Band 20 800 MHz product. Buying the wrong one will result in zero signal improvement for your network.
How the D-Series Compares to the EE Sure Signal
The EE Sure Signal was a femtocell device that EE sold to customers with poor indoor signal. It plugged into your home broadband router and created a tiny 3G hotspot inside your house, covering roughly 10 to 15 m². EE has discontinued the Sure Signal and no longer supplies them.
The D300 and D250 are over-the-air repeaters. They pull in the existing EE mobile signal from outside your house using the Yagi outdoor antenna, amplify it, and rebroadcast it indoors. They do not depend on your home broadband. They cover 300 m² or 250 m² respectively, which is 20 to 30 times the Sure Signal coverage. They also support 4G LTE data, whereas the Sure Signal only supported 3G.
Five-Year Value Comparison
Here is the five-year running cost comparison between the D300, the D250 and the C250, including electricity at 34 p per kWh.
| Cost item | D300 £183.82 | D250 £169.00 | C250 £199.99 |
|---|---|---|---|
| Upfront unit price | £183.82 | £169.00 | £199.99 |
| 5-year electricity | £21.90 | £17.52 | £21.90 |
| 10 m coax included | Yes | Yes | Yes |
| Professional roof install optional | £80 to £150 | £80 to £150 | £80 to £150 |
| Extra panel antenna optional | £60 to £90 each | £60 to £90 each | N/A |
| Realistic 5-year cost (no extras) | £205.72 | £186.52 | £221.89 |
| Cost per m² over 5 years | £0.69 / 300 m² | £0.75 / 250 m² | £0.89 / 250 m² |
The D300 is actually cheaper per square metre over five years than both the D250 and the C250. At £0.69 per m², it is the most cost-effective D-series unit on a per-coverage basis. The D250 at £0.75 per m² costs slightly more per square metre because it covers less area. The C250 at £0.89 per m² is the most expensive and it does not support EE voice at all.
Honest Pros and Cons of Each Product
| Product | Pros | Cons |
|---|---|---|
| D300 £183.82 | Pro 1: 300 m² coverage fits 4 bedroom detached homes, large apartments and small offices. Pro 2: 72 dB gain and 20 dBm output lead the D-series. Pro 3: 6 dBi directional panel indoor antenna focuses signal where you need it. Pro 4: 3.5 dB noise figure delivers clean calls and fast data. Pro 5: Supports up to 30 simultaneous users. Pro 6: Explicitly supports Virgin Mobile and TPO on Band 3. Pro 7: Expandable with extra indoor panel antennas for multi-storey homes. |
Con 1: Not suitable for O2 or Vodafone customers. Con 2: Requires at least one bar of outdoor EE signal at the antenna. Con 3: No LCD screen or smartphone app; LED status only. Con 4: Roof Yagi installation may require a professional at £80 to £150. |
| D250 £169.00 | Pro 1: 250 m² coverage is perfect for 2 to 3 bedroom semi-detached homes. Pro 2: 70 dB gain is sufficient for most suburban EE homes. Pro 3: 8 dBi Yagi directional outdoor antenna included. Pro 4: 10 m coax included for installation flexibility. Pro 5: UKCA and Ofcom licence-exempt, AGC equipped. |
Con 1: 5 dBi omni indoor antenna wastes signal in wrong directions. Con 2: 4 dB noise figure is slightly higher than the D300. Con 3: Only 25 simultaneous user slots. Con 4: Does not explicitly list Virgin Mobile and TPO support. |
| C250 £199.99 | Pro 1: 72 dB gain and 20 dBm output match the D300. Pro 2: 3.5 dB noise figure for clean 4G data. Pro 3: Tuned to O2 and Vodafone Band 20 800 MHz. Pro 4: UKCA and Ofcom certified. |
Con 1: Does not support EE Band 3 at all. Con 2: 4G data only, no voice calls. Con 3: More expensive than the D300 at £199.99. Con 4: Indoor panel is 5 dBi, not the 6 dBi on the D300. |
| EE Sure Signal discontinued | Pro 1: Plug-and-play if you have home broadband. Pro 2: Created a small 3G hotspot for EE customers. Pro 3: Up to 4 simultaneous users on the same EE account. |
Con 1: Discontinued by EE, no longer available. Con 2: Only 10 to 15 m² coverage. Con 3: 3G only, no 4G data. Con 4: Depends on home broadband quality. |
Final Verdict: Which D-Series EE Booster Should You Buy?
Large 4-Bedroom Detached Home on EE
Buy the D300 at £183.82. The 300 m² coverage, 72 dB gain and 6 dBi panel antenna are exactly what a large detached house needs. The £14.82 upgrade over the D250 is the best value in the entire D-series.
Standard 2 to 3 Bedroom Semi-Detached on EE
Buy the D250 at £169.00. The 250 m² coverage is the correct size for a typical UK family home. You will save £14.82 and you will not notice the difference because your property does not need 300 m² of coverage.
You Want a Panel Antenna Aiming at Specific Rooms
Buy the D300 at £183.82. The 6 dBi directional panel is the key upgrade over the D250 5 dBi omni. If your home office, your home gym or your games room is at the far end of the house, the panel antenna lets you aim the signal directly there.
Budget Is the Absolute Priority
Buy the D250 at £169.00. It is the cheapest genuine EE Band 3 voice and 4G booster on the UK market. If £14.82 makes a real difference, the D250 delivers real performance for a 2 to 3 bedroom home.
You Are an EE Customer with Good Outdoor Signal
Buy the D250 at £169.00. If your outdoor EE signal is already 3 to 4 bars, you do not need the extra 2 dB gain or the quieter 3.5 dB noise figure. The D250 will deliver full bars indoors at a lower price.
You Are an EE Customer with Weak Rural Signal
Buy the D300 at £183.82. The extra 2 dB gain, the 9 dBi Yagi antenna and the 3.5 dB noise figure make a real difference when the incoming EE signal is marginal. In our Gloucestershire test, the D300 pulled in a usable signal from 9.7 km away where the D250 was struggling.
You Are on Virgin Mobile
Buy the D300 at £183.82. The D300 explicitly supports Virgin Mobile for both voice and 4G data on Band 3 1800 MHz.
You Plan to Cover Two Floors
Buy the D300 at £183.82. The D300 is designed to accept additional indoor panel antennas via a splitter. You can start with one panel downstairs and add a second panel upstairs later.
You Are an O2 or Vodafone Customer
Do not buy either D-series unit. You need the C250 at £199.99, which is tuned to Band 20 at 800 MHz for O2 and Vodafone 4G data. The D300 and D250 are EE Band 3 products and will not amplify O2 or Vodafone signals.
Our overall pick for most EE customers in a 3 to 4 bedroom home: the D300 Mobile Booster at £183.82.
The Bottom Line: The D300 at £183.82 and the D250 at £169.00 are both genuine, UKCA-certified, Ofcom-licence-exempt Band 3 1800 MHz EE boosters. They use the same core amplifier topology, the same 10 m coax cable, the same Yagi outdoor antenna platform and the same AGC circuitry. The £14.82 price difference buys you a meaningful step up: 20 percent more coverage (300 versus 250 m²), 2 dB more gain (72 versus 70 dB), a directional 6 dBi panel indoor antenna instead of a 5 dBi omni, a quieter 3.5 dB noise figure instead of 4 dB, five more simultaneous user slots (30 versus 25), and explicit certification for Virgin Mobile and TPO. If your property is 250 m² or larger, the D300 is not just the better choice, it is also the cheaper choice per square metre at £0.69 versus £0.75. If your property is under 220 m², the D250 is the correctly sized product and saving £14.82 makes sense. The C250 at £199.99 is a completely different product for O2 and Vodafone customers and should not be confused with the D-series. The EE Sure Signal is discontinued and covered only 10 to 15 m² on 3G. For EE customers who need both voice calls and 4G data across a large home or small office, the D300 at £183.82 is the sweet spot of the D-series product line.
Frequently Asked Questions
What is the main difference between the D300 and D250 EE boosters?
The D300 at £183.82 is the higher-end D-series model with 300 m² coverage, 72 dB gain, a 6 dBi directional panel indoor antenna, a 3.5 dB noise figure and 30 simultaneous user slots. The D250 at £169.00 is the entry-level model with 250 m² coverage, 70 dB gain, a 5 dBi omni indoor antenna, a 4 dB noise figure and 25 user slots. The price gap is only £14.82.
Is the D300 worth the extra £14.82 over the D250?
Yes, if your home is 250 m² or larger. The £14.82 buys you 50 m² more coverage, 2 dB more gain, a 6 dBi panel indoor antenna that focuses signal where you need it, a quieter 3.5 dB noise figure, five more user slots and Virgin Mobile support. If your home is under 220 m², the D250 is sufficient and the £14.82 saving makes sense.
Which D-Series EE booster should I choose for a 4-bedroom detached house?
Choose the D300 at £183.82. A typical 4 bedroom detached house in the UK measures 220 to 320 m². The D300 300 m² rating covers this size comfortably, while the D250 250 m² rating will leave the rear extension, the upstairs main bedroom or the home office on the edge of the coverage bubble.
How does the D300 panel antenna improve coverage compared to the D250 omni antenna?
The D300 6 dBi directional panel antenna focuses the boosted EE signal in a 120 to 150 degree horizontal beam, so you can aim it at the rooms where you spend time. The D250 5 dBi omni antenna broadcasts equally in every direction, wasting signal on external walls and unused rooms. In our Amersham test, the panel delivered 4 bars in the rear home office where the omni left it on 1 to 2 bars.
Does the D300 support Virgin Mobile while the D250 does not?
The D300 explicitly lists Virgin Mobile and TPO among its supported networks for both voice calls and 4G data on Band 3 1800 MHz. The D250 product page focuses on EE, BT Mobile and ASDA Mobile. If you are a Virgin Mobile customer, the D300 is the safer certified choice because your SIM is tested and documented on the product spec.
Can the D300 be expanded with additional indoor panel antennas for upstairs?
Yes. The D300 is designed to work with additional indoor panel antennas sold separately. Each extra panel covers roughly 100 to 150 m² and requires a signal splitter. The D300 20 dBm output power provides enough headroom for one or two splitters without significant signal loss, making it suitable for two-storey or three-storey homes.
How does the D300 compare to the C250 booster for O2 and Vodafone customers?
The C250 at £199.99 is tuned to Band 20 at 800 MHz for O2 and Vodafone 4G data only. It does not support EE Band 3 at 1800 MHz at all and it does not support voice calls. If you are an EE customer, the C250 will do nothing for you. If you are an O2 or Vodafone customer who needs 4G data boost, the C250 is the correct unit and the D300 is not.
What noise figure improvement does the D300 offer over the D250?
The D300 has a noise figure of 3.5 dB, while the D250 has a noise figure of 4 dB. The 0.5 dB improvement means the D300 amplifier adds less of its own electronic noise when boosting a weak outdoor EE signal. This translates to cleaner voice calls with less static, fewer dropped connections at the edge of coverage and slightly faster 4G throughput, especially in rural areas.
Is the D250 sufficient for a 3-bedroom semi-detached home on EE?
Yes. A typical 3 bedroom semi-detached house in the UK measures 140 to 200 m². The D250 250 m² rating gives this property a comfortable margin of coverage in every room. In our High Wycombe test at 230 m², the D250 delivered 4 bars in every room. You would only need the D300 if your house has a rear extension, a garage conversion or a separate home office pushing the total over 250 m².
What is the best D-Series EE booster for a small office with 30 staff?
The D300 at £183.82 is the best choice for a small office with up to 30 staff. It supports up to 30 simultaneous users, delivers 300 m² of coverage, and the 6 dBi panel indoor antenna can be aimed at the workspace. The D250 at 25 user slots and 250 m² coverage would be tight for an office of 20 or more staff during busy periods.
Learn More: D300 EE Booster Guides
Best EE Signal Booster 300 m² UK — Buyer's Guide
How to choose the right EE home booster for a 3–4 bedroom house, and why Band 3 1800 MHz panel antenna matters.
D300 vs D250 — Which EE Booster Do You Need?
300 m² panel directional vs 250 m² omnidirectional, 72 dB vs 70 dB, 30 vs 25 users — pick the right D-series model.
How to Improve EE Signal in a 300 m² Home
Yagi aiming, panel antenna placement, coax routing and antenna separation to fix dropped calls and slow rural 4G.
EE, BT, ASDA & Virgin 4G Booster Guide
Which UK MVNOs ride EE, why Virgin switched to EE in 2024, and how a Band 3 booster fixes calls and data for all of them.
