I havent got a t-mobile sim card to try it out but I was looking for sim card details and found this offer. I hope its useful for people currently on T-mobile Pay as you go.
Get £5 FREE credit! Just register your pay as you go account and login to My T-Mobile and we'll give you £5 FREE credit to use on UK calls, texts and picture messages. And by registering, you'll get access to all this great stuff too!
See your last 30 days of calls/texts
Keep track of your remaining credit
Top up online with your credit/debit card
Send texts from the web to groups of friends
Set up text alerts to tell you your credit is getting low
About your FREE £5 creditYour FREE £5 promotional credit will be added within 28 days of you completing the registration process and logging in for the first time. We'll send you a text to let you know when it's ready to use.
Once it's been added to your account, you have 30 days to use it. We'll send you a text to let you know when it's expired. You can only use it for calls, texts and picture messages to UK networks.
Your FREE credit will be used before your 'normal' credit.
You can check how much of your free credit is left it'll appear separately in My T-Mobile