Which? customer score
73%
Ofcom complaints
4 per 100,000 customers (average 2)
Network it uses
O2
Owned by
Sky UK Ltd, owned by Comcast
Customer service
Phone, live chat, Facebook Messenger, SMS and email via Sky Help, plus the My Sky app and Sky Community forum
EU roaming
Roaming Passport Plus: £2 a day in 120 destinations (including the EU); free in the Republic of Ireland
Contracts
12-month minimum term SIM-only, then rolling monthly
Credit check
Yes, all plans subject to status and credit check; 18+ only
Price rises
Data plan price may increase during minimum term (exact April amount not seen)
Features
5G: Yes · eSIM: Yes · Wi-Fi calling: Yes · Data rollover: Yes
Perks
Piggybank: unused data saved for up to 12 months, shareable across up to 7 SIMs or swapped for rewards (not on unlimited plans) Sky VIP rewards and device discounts Roaming Passport Plus: UK allowance in 120 destinations for £2 a day Change your data plan monthly
Plans
Compare with other O2 networks Every Sky Mobile plan we track
Sorted by what you pay over 12 months.
| Network | Data | Contract | Monthly | 12 months | |
|---|---|---|---|---|---|
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing | 3GB | 12 months | £4 | £48.00 | Go to Sky Mobile Provider link |
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing | 10GB | 12 months | £6 | £72.00 | Go to Sky Mobile Provider link |
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing | 40GB | 12 months | £8 | £96.00 | Go to Sky Mobile Provider link |
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing | 50GB | 12 months | £11 | £132.00 | Go to Sky Mobile Provider link |
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing | 5GB | 12 months | £12 | £144.00 | Go to Sky Mobile Provider link |
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing | Unlimited | 12 months | £18 | £216.00 | Go to Sky Mobile Provider link |
| Sky MobileRuns on O2 · Data rollover (not Unlimited); roaming £2/day; comparison-site listing; Sky site shows 75GB £14 (was £23) offer | 75GB | 12 months | £23 | £276.00 | Go to Sky Mobile Provider link |
Good
- Piggybank saves unused data for later or for rewards
- Cheap roaming in 120 destinations at £2 a day
- Uses the O2 network with 5G, eSIM and Wi-Fi calling
Not so good
- Most complained-about mobile provider in Ofcom's Q1 2026 figures
- Monthly price can rise during the contract
- Credit check and 12-month minimum term
Same signal
Other networks on O2
Same masts, so the same coverage. Worth comparing prices.
Sources: en.wikipedia.org, sky.com, sky.com, sky.com.