T-Mobile don't exist in Poland
true but i was able to use my T-Mobile phone there on the ERA network which was the best network to be on .. on the T-Mobile uk website you do get a list of about four polish mobile network you can use with T-Mobile ...
... i had no problems on the ERA network when i was in Poland
You are charged on that connection 40pence per SMS 20 pence per MMS 38pence to make a call to the UK and 19pence to receive a call ..... but the other party will have to pay part the connection cost of roaming ... so if they on a PAYG phone will chew their credit in effect ...
I WILL STRESS that your
free monthly allowances is not useable in POLAND and you will be charged those prices above ....
if you want this option of using your free allowances you have in the uk then your best bet is to go on a vodafone contract as they are only ones that allow currently you to use your free allowances abroad
:)