The CW250 is the flagship Band 20+1 all-network 3G+4G unit: ≥60 dB uplink / ≥65 dB downlink gain, ≥17 dBm output (7 dBm more than the CW200's ≥10dBm), 250m² coverage, 25 users and up to 3 indoor antennas via a 3-way splitter, for £295.00. The CW200 is the smaller 200m²/20-user/≥10dBm model and the CW100 the 100m²/10-user entry. The CG250 at the same £295.00 pairs Band 20 with Band 8 (900MHz) for O2/Vodafone 4G plus 2G voice; the CD250 pairs Band 20 with Band 3 (1800MHz) for EE+O2/Vodafone 4G only. Choose CW250 when you want 4G data plus 3G fallback across EE, O2, Vodafone and Three in a larger 250m² home.

Band 20 (800 MHz) carries EE, O2, Vodafone and Three 4G LTE data over long rural distances; Band 1 (2100 MHz) carries 3G UMTS data, voice calls and SMS across the same four networks and acts as fallback when 4G drops. The CW250 amplifies both at once, so a phone keeps 4G data where available and reverts to boosted 3G calls in areas without 4G, rather than falling dead.

Up to 250 m² (about 2,691 ft²) covers a three-bedroom house or large flat, a family home across living room, kitchen and bedrooms, a rural large home or holiday cottage, a small office/café/shop, or a large garage/workshop/metal building. The whip re-broadcasts boosted 4G and 3G around that footprint; a whole detached house or multi-storey property needs a larger model.

The CW250 supports up to 25 phones or data devices connected at the same time, sharing boosted Band 20 4G data and Band 1 3G capacity across a three-bed home, family house or small office/café. Beyond 25 active devices the shared RF capacity thins out; it is connected capacity, not a guaranteed 25 separate high-speed lines at once.

Gain in dB measures how much the amplifier strengthens the incoming signal: 60 dB uplink lifts the phone's signal back to the mast and 65 dB downlink lifts the mast's signal to the phone. Output in dBm measures final radiated strength; ≥17 dBm is 7 dBm more than the CW200's ≥10dBm (roughly 5x the radiated power), which spreads boosted 4G and 3G further across the larger 250m² footprint within Ofcom licence-exempt limits.

No. The CW250 covers Band 20 (4G) and Band 1 (3G) only; it does not amplify 2G GSM voice on Band 8 (900MHz) for O2/Vodafone or Band 3 (1800MHz) for EE. Calls work over boosted 3G Band 1 or over 4G VoLTE where the handset and network offer it; if you specifically need O2/Vodafone 2G voice fallback, the Band 20+8 CG250 at the same £295.00 is the correct choice.

Band 1 (2100MHz) 3G UMTS data, calls and SMS are boosted for EE, O2, Vodafone and Three, plus networked MVNOs such as Asda, BT, giffgaff, iD Mobile, Lycamobile, Talkmobile, Orange, Plusnet, Sky, Smarty, Tesco, T-Mobile, Virgin and TPO; Lebara and TalkTalk receive 3G only. This all-network 3G plus Band 20 4G is the CW250's unique Band 20+1 position.

Expandable coverage by adding indoor antenna, splitter, cable if the outside signal is strong. When the outdoor donor is strong, a 3-way passive splitter splits the indoor feed to up to 3 whips on far rooms or floors using extra coaxial cable — more than the CW200's 2-antenna limit; splitting weakens each branch, so it only helps with a strong donor, and keep outdoor-indoor separation to prevent feedback.

The standard kit ships a 5 dBi omni on a 10m outdoor cable plus a 5m indoor cable; add the high-gain Yagi directional aerial for weak fringe signal behind hills, upgrade the outdoor cable to 20/30/40/50m for a remote roof, and add a 18KA lightning surge protector on an exposed mount. You still need at least 1–2 bars of usable outdoor Band 20/Band 1 signal at the antenna point; a booster cannot create signal where none exists.

The CW250 boosts 4G LTE data (Band 20) and 3G UMTS data/calls/SMS (Band 1); calls over 4G work when the handset and network offer VoLTE. It does not boost 5G NR on any band and it does not boost 2G GSM. It carries a 365-day money-back guarantee with free shipping (handling 1–2 working days, UK transit 10–15 working days; return shipping deducted from refund), covering 15 European countries.