What does it mean I need to activate this new phone.
I have an existing T-mobile plan. I just want a new phone. If I buy this phone, will I be charged for anything over and above my existing plan?
If you already have a T-Mobile acct then all you need to do is insert your SIM card into this phone and that's it. Your number and acct info is all on your SIM card. I bought this phone just to upgrade my current T-Mobile phone. Only problem you may have is if your SIM card is a different size then this phone takes, and if so just call T-Mobile and they will replace your SIM card with the one in the box included with the phone. Activation fees are only if your creating a new T-Mobile acct.