DJ

I recently bought a T-Mobile iPhone through Gazelle's ebay store. I went into the T-Mobile store and gt a sim and went home to activate one of the prepaid plans. When I went to activate my phone all that comes up in Sim Not Valid. It says that it is not supported under activation policy. What should I do?!

okay so here is the problem i have a pretty old Dell Inspiron Laptop E1405 i recently bought a SVGA monitor cables to basically use my HDTV as a monitor for my computer. However once i got the cable it does not want to work and i am assuming that it may be because i had a virus awhile ago and i wiped my system clean and i only installed 12 drivers or so, so i am guessing that i may be missing a driver or compatibility that my computer is lacking in order to stream directly to my TV. Anyone have any idea on which drivers or anything that i am missing and need to get, because this is really frustrating and i need some really good help right about now... please and thank u for any help that you can offer

okay so i have this dell laptop that is pretty old and there it has basically no battery life. whenever i use it, like at school or friend's houses or anywhere i always have to use the power connection. And recently every time i turn it on it says that the system will run slower and wont charge because i need a new battery or whatever. My question is should i get a new battery? if yes, where can i get one? and will it solve the problem and make my system faster like how it was when i 1st got my laptop? and is it worth it to buy a new battery instead of just buying a new laptop?