SG POSTCODE AREA · 19 DISTRICTS SAMPLED
Stevenage mobile coverage O2 strongest indoors, 99% vs EE 84% SG postcode area
No network wins Stevenage on overall coverage: all four are within 2 points, but indoors O2 reaches 99% of sampled addresses and EE 84%.
Stevenage as a whole
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O2
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Vodafone
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Three
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EE
Ofcom Mobile Coverage data (May 2025), measured across 2,021 addresses in 104 sampled postcodes, pooled from 19 districts. Methodology.
What differs inside Stevenage
Where the networks split most
- SG4 Weston, Kimpton, Codicote: indoors O2 100%, Three 28%.
- SG6 Letchworth South, Fairfield, Wymondley: indoors O2 and Vodafone 100%, Three 32%.
- SG16 Henlow, Clifton, Stondon: indoors O2, Three and Vodafone 100%, EE 34%.
Each network's weakest and strongest district
| Network | Indoor |
|---|---|
| EE | 34% in SG16 Henlow; 100% in 10 districts |
| O2 | 92% in SG7 Baldock; 100% in 16 districts |
| Three | 28% in SG4 Weston; 100% in 9 districts |
| Vodafone | 64% in SG4 Weston; 100% in 12 districts |
Middle of the area against its edges
The 6 districts nearest the middle (SG1 Wymondley, SG2 Weston, SG4 Weston, SG5 Stotfold, SG6 Letchworth South, SG7 Baldock) against the 6 furthest out (SG8 Melbourn, SG10 Much Hadham, SG12 Hunsdon, SG13 Hertford Heath, SG18 Biggleswade, SG19 Sandy):
- Three indoors: 85% in the middle, 98% at the edges.
District by district
| District | Places | Indoor, low to high | Addresses |
|---|---|---|---|
| SG1 | Wymondley, Great Ashby, Manor | 100% on all four | 113 |
| SG2 | Weston, Walkern, Knebworth | 100% on all four | 88 |
| SG3 | Knebworth, Tewin, Codicote | 100% on all four | 158 |
| SG4 | Weston, Kimpton, Codicote | Three 28%; O2 100% | 53 |
| SG5 | Stotfold, Fairfield, Shillington | 100% on all four | 61 |
| SG6 | Letchworth South, Fairfield, Wymondley | Three 32%; O2 and Vodafone 100% | 62 |
| SG7 | Baldock, Ashwell, Bygrave | O2 92%; Three 100% | 144 |
| SG8 | Melbourn, Reed, Great | 100% on all four | 120 |
| SG9 | Sandon, Standon, Braughing | Three 99%; the rest 100% | 77 |
| SG10 | Much Hadham, Little Hadham, Widford | Three 86%; the rest 100% | 36 |
| SG11 | Standon, Braughing, Little Hadham | EE 72%; O2 and Vodafone 99% | 67 |
| SG12 | Hunsdon, Great Amwell, Hertford Heath | EE 99%; the rest 100% | 114 |
| SG13 | Hertford Heath, Bayford, Essendon | EE 53%; O2 100% | 131 |
| SG14 | Watton-at-Stone, Aston, Tewin | Three 87%; EE and O2 100% | 137 |
| SG15 | Arlesey, Fairfield | EE 65%; O2 100% | 137 |
| SG16 | Henlow, Clifton, Stondon | EE 34%; the rest 100% | 174 |
| SG17 | Haynes, Shefford, Meppershall | Three 83%; the rest 100% | 121 |
| SG18 | Biggleswade, Langford, Northill | 100% on all four | 133 |
| SG19 | Sandy, Potton, Northill | EE 64%; Vodafone 99% | 95 |
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