But your account is considered open the moment your application is approved — regardless of whether you activate the card. Since opening a new account can have some impact on your credit score ...

These steps show you how to do it: Power down your phone and then insert the new SIM card ... for this You may find it easier to activate your T-Mobile SIM card on your computer as you'll skip ...

Getting that new credit card can be a really exciting first step towards expanding your financial options. Whether this is your first credit card or an upgrade, you will need activation to start ...