3 bad phones in one week

  norrisnovice 19:42 14 Aug 13

i have upgraded with tmobile to a sony experia sp within minutes of trying to make the first call this error message came up call failed imsi unknown invlr error code mm#4 every time i tried to call a number i got this t mobile sent me a replacement and the sam thing happened has it did with the 3rd replacemet hand set anyone come across this before even t mobile say they are baffled

  Forum Editor 11:47 17 Aug 13

"even t mobile say they are baffled"

Talk to their call centre and suggest that they credit your account with £10. The go to any T-Mobile (or EE) shop and ask for a new SIM. You'll be charged £10 for it.

It may do the trick - you'll retain your phone number, but you'll need to back up the old SIM before you buy the new one, so you still have your contacts list etc. The old SIM will stop working within minutes of you leaving the shop, and the new one will work immediately.

It's worth a try, as it won't cost you anything.

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