Problem with roaming

[Anonymous]

Hello.

I've got problem with roaming on my Polish mobile phone, set up to contract in Plus network. After coming to UK (Oxford, to be precise) it all worked fine - receiving signal via o2. Two weeks later, I were already unable to receive phone calls from both UK and Poland (message was "this person is out of range of network"). One more week, and I couldn't make phone calls from this mobile either. I'd like to know, if that is solely issue with Polish mobile network provider, or maybe o2 just plainly fails to co-operate with mobiles set up on Plus/Era? Any advice?

And one more thing - anyone who swapped recently to giff-gaff experienced lack of confirmation about delivered messages? I changed from Vodafone and have been using default g-g centre, yet with no result. Do I need to change some more settings on my mobile phone (Nokia 6300, to be precise)?

I'd be very grateful  for any help

[MI5 · Accepted solution]

Sounds like your SIM may have gone faulty. Also, the O2 network (same as GiffGaff) doesn't support delivery messages unless you start every text with *0#