I purchased a brand new Sony C510a for my wife when XT started last year.
It worked just fine for 10 months then started playing up - the problem is that it cuts off mid-call reboots and then says inactive sim.
At the 10 month point we highlighted the issue with Orb where we brought the phone - they replaced the sim card but the problem continued.
We went back and they got telecom to do a network reset - still the issues continued.
They then sent the phone away to be repaired - the repairer loaded the latest firmware but the issues continued.
They (orb) sent the phone to another repairer who again loaded some new firmware - however yet again the same issues occured with the phone (it's worth noting that the phone was out of warranty but sony granted a warranty extension).
Orb then sent the phone away again it's now back and guess what - we have the same issues.
While it's been away my wife's been using another phone which has been working just fine - so the issue does appear to be the phone.
Orb have now said there is nothing more they can do.
So where to from here?