18 providers offer 210 broadband deals in White Mountain, from £15.00 a month and up to 1,600 Mbps. Typical measured speed is 138 Mbps down and 27 Mbps up, 37% above the UK download average.
Best value broadband deal in White Mountain, Lisburn and Castlereagh (BT28)
The best value in White Mountain, Lisburn and Castlereagh (BT28) on full first-year cost is Plusnet's Full Fibre 145: £292 across year one, about £24 a month. A £155 reward card is bundled in. 145 Mbps covers streaming, video calls and working from home.
Best value in White Mountain, Lisburn and Castlereagh (BT28)
£22.99/mo
rises to £26.99 in March 2027 (+£4)
Avg £26.32/mo over contract · £632 total over 24 months
Fastest broadband deal in White Mountain, Lisburn and Castlereagh (BT28)
The fastest deal available in White Mountain, Lisburn and Castlereagh (BT28) is Full Fibre 1.6GB Premium from EE at 1,600 Mbps.
Fastest in White Mountain, Lisburn and Castlereagh (BT28)
Full Fibre 1.6GB Premium
115 Mbps upload · Full Fibre
Best for power users & big households
£33.99/mo
rises to £37.99 in March 2027 (+£4)
Avg £37.32/mo over contract · £896 total over 24 months
Cheapest broadband deal in White Mountain, Lisburn and Castlereagh (BT28)
The cheapest deal in White Mountain, Lisburn and Castlereagh (BT28) is Fast 24m from giffgaff at £5.00 a month for 200 Mbps. It's full fibre, so the advertised speed is the speed that reaches the router. The £5.00 is an intro price that rises to £25.00 a month after the intro window, making the real first-year cost £180. Comfortably faster than the UK average.
Cheapest in White Mountain, Lisburn and Castlereagh (BT28)
£5/mo
for 6 months, then £25/mo
Avg £20/mo over contract · £480 total over 24 months
Compare broadband deals in White Mountain, Lisburn and Castlereagh (BT28)
£5/mo
for 6 months, then £28/mo
Avg £22.25/mo over contract · £534 total over 24 months
Gig1 Broadband Only
41 Mbps upload · Hybrid Fibre-Coaxial
Best for power users & big households
£25.99/mo
rises to £29.99 in April 2027 (+£4)
Avg £28.99/mo over contract · £696 total over 24 months
Sky Full Fibre Gigafast
100 Mbps upload · Full Fibre
Best for power users & big households
£31/mo
No rises, no surprises.
£749 total over 24 months
Onestream Fibre 55
10 Mbps upload · Hybrid Fibre
Best for small homes, single 4K streamer
£19.94/mo
rises to £22.69 in April 2027 (+£2.75)
Avg £22/mo over contract · £528 total over 24 months
Broadband providers in White Mountain, Lisburn and Castlereagh (BT28)
18 providers serve White Mountain, Lisburn and Castlereagh (BT28), with EE the fastest at 1,600 Mbps.
Ranked by Ofcom complaints per 100,000 customers, fewest first. A down arrow is below the industry average, up is above, and a dash means Ofcom publishes no figure for that provider (usually because it is below Ofcom's 1.5% market-share reporting threshold). A small diagonal arrow shows the past-year trend (↘ improving, ↗ getting worse).
Ofcom records the typical White Mountain, Lisburn and Castlereagh (BT28) download speed at 138 Mbps.
Upgrade nudge
Room to upgrade in White Mountain, Lisburn and Castlereagh (BT28)
Only 23% of the 12,000 connections here are on 300Mbps or faster, even though 94% can get gigabit.
The faster line is already there. For most of these homes it is the contract holding them back, not the infrastructure.
Is your broadband good enough?
The typical White Mountain, Lisburn and Castlereagh (BT28) line runs 138 Mbps.
Working from home
OKStreaming and family use
GoodWhat speeds are people actually getting?
Gigabit reaches 94% of White Mountain, Lisburn and Castlereagh (BT28), and the fastest available is 1,000 Mbps. The full split by band is below.
Which broadband networks reach White Mountain, Lisburn and Castlereagh (BT28)?
The wholesale networks carrying White Mountain, Lisburn and Castlereagh (BT28) broadband, from Openreach to Virgin Media and the altnets, read off the live deals.
These are the alternatives to Openreach in White Mountain, Lisburn and Castlereagh (BT28): smaller infrastructure firms that have laid their own fibre. The pricing pressure they create is good news on a Saturday morning bill review.
- CityFibre: Sky, The One Broadband
- 4th Utility: 4th Utility, Rise Fibre
Sitting alongside, Openreach and Virgin Media O2 cover White Mountain, Lisburn and Castlereagh (BT28) as well (Openreach covers every UK premises bar a tiny remote tail).
We are seeing 18 providers selling deals into White Mountain, Lisburn and Castlereagh (BT28) today.
What broadband coverage does White Mountain, Lisburn and Castlereagh (BT28) have?
Superfast broadband reaches 99% of White Mountain, Lisburn and Castlereagh (BT28) premises and gigabit 94%, on Ofcom's premise-level data.
Can I rely on mobile broadband in White Mountain, Lisburn and Castlereagh (BT28)?
Outdoor 5G reaches 100% of White Mountain, Lisburn and Castlereagh (BT28) homes. Here is how mobile holds up if the line drops.
How White Mountain, Lisburn and Castlereagh (BT28) compares within Lisburn and Castlereagh
Across 5 postcode districts in Lisburn and Castlereagh, by premises count, typical speed and gigabit coverage.
Nearby areas
Frequently asked questions
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* Based on Go.Compare research estimating that 28% of UK broadband users pay for faster broadband speeds than they need (which we interpret as overpaying), equivalent to around 7.5m UK households.
Speed and coverage figures for White Mountain, Lisburn and Castlereagh (BT28)come from Ofcom's Connected Nations data, current to January 2026. Deal prices are pulled live from providers. Compiled by the FindBroadband team. See how we rank and source our data.