mokknathal If you never had any issue using your giffgaff SIM until now and your service suddenly stopped, then the possible reasons are:
• There is a service outage
• Your phone is faulty or does not recognise the SIM anymore
• The SIM itself is faulty
• Your SIM has been inactive for too long – more than six months
There are two ways to identify a service outage:
• An outage is identified in your area by the https://www.giffgaff.com/coverage-and-service
• The issue also affects other giffgaff or O2 SIMs in the same area. If you don’t have another active SIM to verify, you can go to this board to see if there is another giffgaffer with the same issue in your area.
If there is an outage identified in your area, O2’s engineers are already working on it and you will have to wait for them to restore the service.
If there is no outage identied in your area and other phones with giffgaff or O2 SIMs are experiencing the same problem(s) as you then it is probably a new issue which has not yet been reported. To report a network fault give O2 customer services a call using any of the contact details provided here O2 contact details. To help them, try and give them as much detail as possible, such as:
• Location (post code specific).
• Behaviour (dropped calls, no service etc).
• Does it happen on 2G or 3G or both.
• Other customers affected.
• Length of time the issue has been going on for.
Check if your handset if faulty
Try using your SIM card in another unlocked (or O2 locked) handset, if it works your handset maybe at fault. in this case you can try a hard reboot. On most phones, this involves removing the battery from the device whilst your handset is switched on. For iPhones, press and hold the home and lock key for 10 seconds. It is also advisable at this stage to check that the SIM is clean.
Check if the SIM is faulty
If you have an error message on your handset (e.g. “SIM not recognised” or “SIM not valid”) or if your SIM does not work when tried in another phone, do a standard SIM clean (which is just really giving the SIM card a wipe to ensure that there’s no dirt on the card, being carefuly not to scratch the gold chip).
Once you have cleaned your SIM, re-insert it into your phone. If you have activated successfully, your SIM should now be in full working order. If not, it’s is certainly faulty.
If your SIM is faulty, you will need to either order a replacement SIM card or if you have another unactivated SIM handy, perform a SIM Swap.