have been using giffgaff with mixed success for the last ten days..
the problem i am experiencing now is when i attempt to make a call, it rings once, then i receive the message 'Call Ended' the recipient never received my call.
have tested on numerous numbers. have restored HTC Wildfire, have turned handset on and off on numerous occasions, have got at least 100 minutes of airtime remaining, SMS works okay.
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a Virgin Mobile SIM has been tested and works fine, as does the old T-Mobile SIM
the GiffGaff SIM will still send SMS and receive calls.
Ah, well that's good anyway! As suggested in the post above, have you double checked the O2 maintenace status for your area?
If you have, and it's OK, then I guess it can only be the sim that's at fault. If you choose to replace the sim, then you'd need to report it Los/Stolen, and wait for replacement to be sent to you. Here's all the info on that: http://support.giffgaff.com/app/answers/detail/a_id/100
If you have any more questions then please ask
I would still try to obtain an O2 sim to try in your phone first, or try your sim in another handset. This may tell you if the fault is with O2 in general in your area. Let us know what you decide.
As you're also having problems outside of your own area, then I guess your only option would be to get a replacement sim.
SIM has been removed and installed a few times.
The carrier settings are erased and reselected when the handset is restored.
The coverage is fine.
It is not localised as I have attempted calls from both East and Central London.
The quickest way forward would be to try another O2, or unlocked handset, are you able to do that?
the current unlocked handset has worked on T-Mobile for the past 12 months.
it also worked on giffgaff. only in the last few days has this problem began.
i do not have access to another handset or another o2 SIM.
Rather than go down the route of waiting for a replacement sim, do you think you could borrow a sim just to test your handset (any network would do), at least it would test your handset. As the problem seem now to be constant, then there's a possibility of it being the handset.
That's about all I could suggest, either trt to access to another handset to test your sim, or another sim to test your handset.
Do you think that might be possible?