Both are Band 7 (2600 MHz) EE/Vodafone 4G LTE + VoLTE boosters with the same ≥60 dB uplink / ≥65 dB downlink gain. The L250 is the high-power, larger-footprint model: it delivers ≥17 dBm output (vs the L200's ≥10 dBm), covers up to 250 m² (vs 200 m²) and supports up to 25 simultaneous users (vs 20). If you have a 2–3 bedroom house, a cafe or a small shop where the whole floorplate needs coverage and a dozen phones connect at once, the L250 is the right call. If you have a studio flat or 1-bed apartment under 200 m², the L200 at £249.99 is enough.

They target completely different bands. The L250 boosts high-frequency Band 7 (2600 MHz) — the dense-town 4G capacity band EE and Vodafone use in built-up areas. Its ≤4 dB noise-figure receiver and ≥17 dBm high-power output are tuned for congested indoor 2600 MHz. The C250 at £199.99 boosts low 800 MHz Band 20 for rural O2/Vodafone reach. If your problem is rural weak signal, the cheaper C250 is better; if your problem is congested indoor 2600 MHz in a town or city, the L250 is the correct tool — and it is the only Boost4U high-power Band 7 unit.

The outdoor omni antenna sits on your roof or external wall, where it grabs the outdoor Band 7 signal directly — the booster does not rely on the signal passing through your walls. It then rebroadcasts a clean, amplified signal inside via the panel antenna. So even 2600 MHz's weaker wall penetration does not matter much: you are pulling the signal in from outside the building and feeding it in. You still need 1–2 bars of outdoor Band 7 at the antenna point. Place the panel antenna centrally so the ≥17 dBm output covers both the ground floor and the basement bar area.

The L250 boosts Band 7 (2600 MHz) 4G LTE only — 4G mobile data plus VoLTE HD voice calls. It does NOT boost 5G NR and it does NOT boost 3G. There is no Boost4U Band 7 5G booster in this range yet. If your phone shows 5G indoors but struggles to hold it, the L250 will strengthen the underlying 4G LTE fallback that many 5G calls and data sessions actually fall back on, but it will not amplify a 5G radio carrier directly.

The L250 is rated for up to 25 simultaneous users / devices. That comfortably covers a cafe with 4–6 staff and a dozen customer phones, a 10–15 person small office, or a medium household with several family members. It is not a router — each device still uses its own SIM and data plan — but every device in the 250 m² coverage area benefits from the cleaner signal at once. Beyond 25 active devices you would need a larger enterprise unit.

Yes — the L250 boosts the physical Band 7 2600 MHz radio signal on EE and Vodafone infrastructure, so every carrier riding those networks works: EE, Vodafone, BT Mobile, ASDA Mobile, Virgin Mobile, Orange, T-Mobile, Plusnet, TPO, Voxi, Lycamobile, Talkmobile and Lebara. Insert your existing SIM; no new contract. Just confirm your phone latches onto Band 7 (2600 MHz) outdoors in field-test mode before ordering. It will NOT work on O2 or Three because those networks do not use Band 7.

Yes — that is exactly the scenario it is designed for. The omni antenna captures the strong outdoor Band 7 signal on the roof, the L250 amplifies it by up to ≥60 dB uplink / ≥65 dB downlink at ≥17 dBm output, and the indoor panel antenna rebroadcasts it across up to 250 m². Most users see the phone jump from 1–2 bars indoors to full bars, and weak 1–5 Mbps connections improve to 15–50+ Mbps, depending on outdoor signal and how busy the local mast is.

No. O2 and Three do not use Band 7 (2600 MHz) for 4G — they rely mainly on Band 3 (1800 MHz), Band 20 (800 MHz) and Band 1 (2100 MHz). The L250 only amplifies the 2600 MHz carrier, so an O2 or Three SIM will not see any improvement from it. If you are on O2 or Vodafone rural Band 20, look at the C250; if you are on EE Band 3 voice and data, look at the D250. Check your network's band before you buy.

Typical results move a weak indoor 1–5 Mbps connection up to 15–50+ Mbps, measured on a speed test next to the indoor panel antenna. The real figure depends on two things outside the booster's control: how strong the outdoor Band 7 donor signal is (1–2 bars gives a lower ceiling than 4–5 bars) and how congested the nearest EE / Vodafone cell is at peak evening time. The ≥17 dBm high-power output pushes the signal further across a 250 m² floorplate than a standard 10 dBm unit, but it cannot add extra mast capacity.

You can install it yourself in under 25 minutes — no engineer required. Mount the omni antenna on the roof or external wall, run the 10 m outdoor coax in, fix the panel antenna on a central internal wall, connect the 5 m indoor coax to the L250 unit, and plug in the AC 100–240 V UK mains adapter. AGC locks on automatically within a minute. The unit itself is compact at 180 × 120 × 28 mm, so it slips on a shelf or behind a counter. The only task that sometimes needs a second pair of hands is lifting the outdoor antenna on and off a roof safely. Ofcom licence-exempt, UKCA / CE certified.