Sky Mobile SIM-only deals
Sky Mobile SIM-only deals
7 Sky Mobile plans, cheapest first. Prices checked against Sky Mobile's own site — these are the ongoing monthly costs, not introductory rates.
| Data | Contract | Monthly price | |
|---|---|---|---|
| 3GB | 30-day rolling | £5.00 | Get deal |
| 10GB | 30-day rolling | £8.00 | Get deal |
| 5GB | 30-day rolling | £12.00 | Get deal |
| 40GB | 30-day rolling | £18.00 | Get deal |
| 50GB | 30-day rolling | £20.00 | Get deal |
| Unlimited | 30-day rolling | £21.00 | Get deal |
| 75GB | 30-day rolling | £108.00 | Get deal |
Cheapest Sky Mobile plan is £5.00/mo. Sky Mobile runs on O2's network — compare it against every other provider using the same masts.
The essentials
| Price rises | Yes Raises prices — £1.50/month from 14 February 2026, its first in-contract rise in over 7 years. Customers got a 30-day penalty-free cancellation window. |
|---|---|
| Data rollover | Yes Sky Piggybank banks unused data on all plans except Unlimited — spend it on rewards, upgrades or extra data (holds up to 3 years). |
| Full-speed data | Full speed Full access, no speed caps |
| 5G | ✓ |
| eSIM | ✓ eSIM is available on compatible devices and is activated through your Sky Mobile account. |
| Tube coverage | ✓ You get Tube coverage through O2’s network. TfL station WiFi has been superseded by 4G/5G mobile coverage in tunnels and stations, rolled out by all four networks and growing across the lines — just use your phone and it connects automatically. |
| Inclusive international calls | Some plans Calls to the Republic of Ireland included at no extra cost; other international calls charged. |
| Unlimited data | 550GB 550GB fair-use cap — Sky considers up to 550GB per billing period reasonable per SIM; heavier use may be managed. |
| EU roaming | Some plans Roaming Passport Plus costs £2 a day in 120 destinations; only the Republic of Ireland is free. |
| Roaming data | 25GB Up to 25GB per billing period when roaming; over that it is charged per GB. |
Technical details
| Roaming countries | ? |
|---|---|
| Tethering / hotspot | ? |
| 5G Standalone | ? |
| WiFi calling | ✓ Wi-Fi calling is supported in the UK, though not currently outside it. |
| Roaming beyond the EU | £2 roaming passport plus, … |
| 4G calling (VoLTE) | ✓ |
| RCS messaging | ✗ |
| RCS encryption | ✗ |
| Conference calling | ✓ |
| Missed call alerts | ✗ |
| Visual voicemail | ✓ |
| HD Voice | ✗ |
| Carrier IMS | ✗ |
| Carrier voicemail | ✗ |
| Inclusive MMS | ✗ |
| IPv6 | Some IPv4 only |
| Roaming agreements | MIXTURE - Sky's own arrang… |
| 5G roaming | ✓ |
| 4G calling abroad | ✓ |
Sky Mobile FAQ
How much is Sky Mobile?
The cheapest Sky Mobile SIM-only plan is £5.00/mo (3GB, 30-day rolling). Sky Mobile sells 7 plans in total, and we check every price against Sky Mobile's own site.
What network does Sky Mobile use?
Sky Mobile is an MVNO: it runs on O2's masts, so you get the same signal and coverage as O2, usually at a lower price.
Can I use Sky Mobile abroad in the EU?
Sky Mobile includes EU roaming on some plans. Roaming Passport Plus costs £2 a day in 120 destinations; only the Republic of Ireland is free.
Does Sky Mobile have 5G?
Yes — Sky Mobile includes 5G.
Does Sky Mobile support eSIM?
Yes — Sky Mobile supports eSIM. eSIM is available on compatible devices and is activated through your Sky Mobile account.
Does Sky Mobile raise prices mid-contract?
Sky Mobile does not raise prices mid-contract. Raises prices — £1.50/month from 14 February 2026, its first in-contract rise in over 7 years. Customers got a 30-day penalty-free cancellation window.
Other SIMs on the O2 network
Same masts, same coverage — different prices and features.
Feature and price data is checked by Scrimpr against Sky Mobile's own site and public documentation. Networks change plans often — always confirm details on the provider's site before buying. Some links are affiliate links (marked *), which support Scrimpr at no cost to you.
