Yes if your problem covers more than one room. The G150 adds 5 m² of useful headroom — 150 m² versus 100 m² — plus a 5 dBi outdoor antenna (up from 3 dBi), 60 dB gain (up from 55 dB), 17 dBm output (up from 15 dBm) and a longer 5 m coax (up from 3 m). If you live in a studio or single room, the G100 at £75 is enough. If your dropped calls happen in the back bedroom as well as the lounge, the £10 step up buys the coverage you actually need.

In most UK two-bed terraces (around 70–90 m² built footprint, two floors) the answer is yes, especially if the indoor unit sits in a central hallway or landing and the outdoor antenna points at the mast. 150 m² / 1,614 ft² is the rated maximum, so expect strong bars on the floor nearest the indoor unit and decent bars one wall away. It will not magically cover a three-bed detached house, a loft conversion plus a cellar, or a property with three floors — for that you need the C-series.

The G150 ships with a wall bracket, screws and wall plugs because the 5 dBi antenna performs best mounted outside on a wall, chimney or fascia, where it has a clear line to the mast. You can still press it to an upstairs window if you cannot drill, but the longer 5 m coax is really designed for a proper external fix that pulls in the 1–2 bars of donor signal the G150 needs. Renters can use a temporary window-mount and return it within the 365-day window if it does not suit.

The G150 is voice-and-SMS-only on Band 8 (900 MHz). The C100 adds multi-band 4G LTE data amplification, which is what you need if dropped home broadband or slow mobile internet is the real complaint. If your only pain is missed calls and failing texts on O2 / Vodafone / giffgaff / Sky Mobile, the G150 does the job for less. If you also need to stream, video-call over mobile data or run a home office on 4G, step up to a C-series 4G booster instead.

About 3 dB of extra antenna gain, which roughly doubles the effective signal pulled from the donor point. In practice that means a flat that sat on the edge of usable G100 coverage (weak bars, cut-outs) will hold a solid call once the 5 dBi antenna is aimed at the mast. It is not a night-and-day jump from a standing start, but it is the reason the G150 is recommended for two-bed flats rather than single rooms.

That is exactly the donor level the G150 is tuned for. The 60 dB gain and 5 dBi antenna take a weak-but-present 1–2 bars and re-broadcast them as a strong indoor signal. If you stand outside your front door and your phone shows zero bars and runs emergency-only, no Ofcom-legal booster at this price can manufacture signal from nothing. We recommend checking Band 8 field mode on your phone before ordering, and aiming the antenna at the nearest O2 / Vodafone mast.

Yes — 150 m² is deliberately rated for small two-room footprints: a home office plus a waiting area, a corner shop with a back office, a two-chair dental practice, or a small salon. Unlimited simultaneous users means staff and customers on O2 / Vodafone / giffgaff / Sky Mobile all benefit at once. If your premises are open-plan under 150 m², the G150 is the right size; if you need whole-building 4G data as well, look at the C200 / C250 range.

Because in a two-bed flat the donor antenna usually sits on a front wall or chimney, while the indoor unit lives in a central hallway or back bedroom — that routing easily needs 4–5 m. The 3 m cable on the G100 forces the outdoor antenna to sit on the window right next to the single covered room, which is fine for a bedsit but too short for a terrace. The 5 m length is what makes the 150 m² rating realistic.

The included wall bracket is the recommended fix, but renters can mount the 5 dBi antenna on an upstairs window with a temporary adhesive pad or a fascia-clamp kit (not included), and route the 5 m coax out of a slightly opened window. The indoor unit sticks to the wall with its self-adhesive pad, no holes. If your tenancy forbids even window mounts, the 365-day no-quibble return means you can trial it in situ and send it back if the landlord objects.

Very little. The G150 draws under 10 W from the 240V UK mains adapter — about the same as a single LED downlight. At typical UK domestic electricity rates that works out at roughly £10–£15 per year of 24/7 running. There is no subscription, no SIM contract, no monthly fee — once bought, the unit just sits on the wall and amplifies the O2 / Vodafone Band 8 signal you already pay for through your existing phone bill.