BT3 DISTRICT · BELFAST
Duncairn mobile coverage EE 95% indoors here, 23% in BT15 nearby BT3 · Belfast
No network wins BT3 on overall coverage: all four are within 1 point, but indoors O2, Three and Vodafone reach 100% of sampled addresses and EE 95%.
BT3: Duncairn, Sydenham, Ballymacarrett.
BT3 scores
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O2
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Three
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Vodafone
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EE
Ofcom Mobile Coverage data (May 2025), measured across 39 addresses in 2 sampled postcodes: BT3 9AA, BT3 9JB. Methodology.
How BT3 compares
Every network here is within 8 points of the Belfast average, indoors and outdoors.
Weakest spot in Belfast: BT15 Bellevue, where EE reaches 23% indoors.
Indoor signal around BT3
| District | km away | EE | O2 | Three | Vodafone |
|---|---|---|---|---|---|
| BT3 Duncairn (here) | – | 95% | 100% | 100% | 100% |
| BT15 Bellevue, Cavehill | 2 | 23% | 100% | 100% | 100% |
| BT1 Falls, Duncairn small sample | 2 | 100% | 100% | 100% | 100% |
| BT4 Knock, Belmont | 3 | 100% | 100% | 100% | 100% |
| BT2 Blackstaff | 3 | 100% | 100% | 100% | 100% |
| Belfast average | – | 89% | 97% | 97% | 100% |
Biggest difference nearby: EE indoors, 95% here and 23% in BT15 Bellevue, 2 km away.
Small sample: under 30 addresses sampled.
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