The W300 is the higher-end W-series unit. It raises max gain from 70 dB to 72 dB, cuts the noise figure from ≤4 dB to ≤3.5 dB, lifts coverage from 250 m² to 300 m², increases simultaneous users from 25 to 30, and swaps the basic 6 dBi omni indoor antenna for a 6 dBi panel directional antenna that gives more even coverage across larger floors. If your home is a 4–5 bedroom detached, a shop, bar or small office over 250 m², the W300 is the right size. If you have a compact 2–3 bedroom terrace or flat, the W250 at £169.00 is the budget choice.

Yes — that is exactly what it is built for. Band 1 (2100 MHz) is the 3G UMTS frequency all four UK networks share. The W300 amplifies that single radio wave, so any phone on EE, O2, Vodafone or Three — and any MVNO on their networks — gets a stronger 3G signal inside. It does not matter that your partner is on EE, your teenager is on giffgaff (O2) and your staff are on iD (Three); one unit improves 3G for all of them at once across the 300 m² footprint.

No — they are completely different products at the same price point. The W300 boosts Band 1 (2100 MHz) 3G UMTS for EE, O2, Vodafone and Three (all networks, 3G calls + 3G data). The D300 boosts Band 3 (1800 MHz) and is an EE-only voice + 4G unit for EE, BT, ASDA and Virgin customers. If you have a mixed-operator household or need 3G across all four networks, choose the W300. If you are EE-only and need voice plus 4G data, choose the D300. Do not buy the wrong one based on price alone.

The W300 is a Band 1 (2100 MHz) 3G UMTS booster only. It improves 3G voice calls and 3G data. It does not boost 4G LTE or 5G NR on any band, on any network. If your main problem is slow 4G data, you need a different product — a Band 3 EE voice + 4G unit (D series) or a Band 20 O2/Vodafone 4G unit (C series). If your problem is dropped 3G calls and weak 3G data across multiple networks in a larger home, the W300 is the right fit.

Typically it moves from around 1–5 Mbps with a weak signal up to about 10–30 Mbps with a good boosted signal. Treat that as a guide, not a guarantee: the booster improves the radio link between your phone and the mast, but your final speed is also set by how busy the mast is and its backhaul. A quiet rural 3G mast will give better results than a congested urban one. It is still 3G, so it is suited to calls, messaging, maps and basic browsing — not 4K streaming.

Yes. The W300 amplifies an existing weak donor signal — it cannot create signal from nothing. Before buying, check Band 1 3G signal on your phone outside, near where the Yagi will sit. If you have at least 1–2 bars of 3G outdoors, the booster can push a full-strength signal inside across 300 m². If you show zero bars and emergency-only outside, no Ofcom-legal booster at this price will help. Also note O2 and Vodafone have limited Band 1 3G coverage in some rural areas — check the outdoor signal on the network you actually use.

The 6 dBi panel directional antenna focuses the boosted signal in a chosen direction rather than spraying it evenly in all directions. Across a larger 300 m² floor — a long terrace, a shop back room, an office with multiple desks — aiming the panel at the area that needs it most gives stronger, more consistent signal in the rooms that matter, and less wasted energy bleeding back toward the outdoor Yagi. It is the main hardware reason the W300 covers more area than the W250's omni setup.

Yes. All of those are MVNOs riding on one of the four UK networks: giffgaff, Sky and Tesco use O2; iD and SMARTY use Three; Lebara and Talkmobile use Vodafone; Virgin Mobile and TalkTalk use O2. Because the W300 boosts Band 1 3G across all four host networks, your existing SIM works as normal — no new contract. The only exception is 4G-only data SIMs or plans that no longer fall back to 3G, which are not boosted because the W300 is 3G-only.

Yes, for a typical 3–5 bedroom home, small office, shop or bar. 300 m² (about 3,229 ft²) covers an average detached or large semi-detached house across two floors, or a single-floor shop/pub trading area. It is not designed for very large homes over 300 m², barn conversions, multi-storey commercial buildings or estates — those need a higher-coverage unit. For a standard large family home or small business, expect good 3G signal in most rooms once the 6 dBi panel antenna is aimed centrally.

You are covered by a 365-day money-back guarantee, plus lifetime UK technical support. If the W300 does not improve your 3G calls or data after a proper install (correct Yagi aim, 1–2 bars outdoors, ≥10 m antenna separation), contact support and you can return it by mail for a free return and refund. Free UK delivery takes 10–15 working days after 1–2 days order handling, so order early if you have an urgent deadline.