Troubleshooting to check if your phone is network-locked
| Step |
Action |
What It Fixes |
| 1 | Check your network status | Confirms if issue is network-wide |
| 2 | Toggle aeroplane mode on/off | Re-registers SIM on your network |
| 3 | Restart your phone | Clears temporary network errors |
| 4 | Check your network APN settings | Fixes incorrect data configuration |
| 5 | Re-insert SIM card | Fixes poor SIM contact issues |
| 6 | Contact your network support | Resolves account or SIM faults |
The 8-digit PUK (Personal Unblocking Key) clears a SIM lock triggered by three wrong PIN entries. Ten incorrect PUK attempts makes the block permanent.
!
⚠ Do NOT guess the PUK — 10 wrong attempts permanently destroy the SIM
Unlike the PIN (3 attempts), you get 10 PUK attempts total across all time. Entering the wrong PUK 10 times permanently destroys the SIM card — it cannot be unblocked and a replacement must be ordered. Only enter the PUK once you have confirmed the correct code from your online account, SIM packaging, or network customer service.
Getting an unlock code from your network (How to Check Phone Is Unlocked)
It's possible to locate a PUK code without a support call, in a few different ways:
1. Log in online: the UK APN Hub account portal usually lists the PUK under SIM or account information.
2. App check: opening account or SIM settings in the network's app usually surfaces the PUK.
3. Check the SIM's original card: many providers print the PUK straight onto the packaging.
4. Speak to customer service: after an identity check, the network can read out the PUK — the UK APN Hub has the correct number.
📶
SIM safety checklist
Locate the actual PUK via the account dashboard or SIM packaging before trying — too many wrong attempts is permanent
Step 1Do not guessStep 2Find PUKStep 3Unlock SIMStep 4Set new PINStep 5Test service
Unlocking your phone from your network online (How to Check Phone Is Unlocked)
Seeing SIM card locked — enter PUK code means entering the 8-digit PUK, setting a new 4-digit PIN twice, after which the SIM reconnects immediately.
📶
SIM safety checklist
Check the account dashboard or SIM packaging for the genuine PUK first, since too many failed attempts locks it permanently
Step 1Do not guessStep 2Find PUKStep 3Unlock SIMStep 4Set new PINStep 5Test service
What to do after your network provides unlock code (How to Check Phone Is Unlocked)
The SIM PIN doesn't have to stay on — Settings → Security → SIM Card Lock allows disabling it or setting an easier one, trading security for convenience.
What happens with an incorrect PUK? (How to Check Phone Is Unlocked)
After ten failed PUK attempts the SIM is gone for good — order a free replacement, and the number and account transfer automatically.
📶
SIM safety checklist
The account dashboard or SIM packaging holds the real PUK — too many incorrect tries permanently blocks the SIM
Step 1Do not guessStep 2Find PUKStep 3Unlock SIMStep 4Set new PINStep 5Test service
!
⚠ Do NOT guess the PUK — 10 wrong attempts permanently destroy the SIM
Unlike the PIN (3 attempts), you get 10 PUK attempts total across all time. Entering the wrong PUK 10 times permanently destroys the SIM card — it cannot be unblocked and a replacement must be ordered. Only enter the PUK once you have confirmed the correct code from your online account, SIM packaging, or network customer service.
Frequently Asked Questions About How to Check Phone Is Unlocked
How do I contact your network UK support?
You can contact your network UK customer support through their official website, via live chat, by phone, or through their social media channels.
How do I check my your network signal strength?
Check your phone's signal bars in the status bar. For a detailed reading, go to Settings → About Phone → Status (Android) or dial *3001#12345#* (iPhone) to open Field Test mode.
What should I do if your network has no service?
If your network shows no service, try toggling Aeroplane Mode on and off, restarting your phone, and checking your network coverage map for your area. If the issue persists, contact your network support.
How do I keep my number when switching to your network?
To keep your number when switching to your network, request a PAC code from your current provider by texting 'PAC' to 65075. You can then give this code to your network when you set up your new account.
Does your network support WiFi calling?
Many your network plans support WiFi calling. Check your network account settings or your network website to see if WiFi calling is available on your plan and how to enable it.