Need help buying used Android phone

[LuckyDogYachtS]

Hello,

I am trying to understand which phones will communicate at 4G speeds with t-mobile. I called T-Mobile. My rep says an AT&T EVO phone will only communicate at EDGE speeds because of the internal antenna??? I understand that only a 4G capable phone will communicate at 4G speeds, what I want to understand is which phones on Ebay or Craigslist will work on t-mobile at 4G speeds. Another friend says I can only buy a phone that has the t-moblie emblem to get 4G speeds??? Is there truly a different antenna inside the phone to communicate at different bandwidths?

Also I would like to understand unlocking vs jailbreak vs rooting?

Thanks you to anyone who is willing to help me as I move into the android market.

 

[LuckyDogYachtS]

Sorry, I see that I posted this question to the wrong forum.

 

[olbriar]

Hello and welcome to Android Forums. It's not so much the antenna as the radios that inside the phone. It has to have the radio for 4G to be 4G capable. I don't know which phones available to T-Mobile are 4G ready. Below I will give you a link to the T-Mobile carrier area and perhaps you can obtain a list there. Thanks for joining these forums and I hope you enjoy your time here.
T-Mobile - Android Forums

 

[olbriar]

Sorry, I see that I posted this question to the wrong forum.

That's not a problem. Often it helps us to direct you to the area where you can receive the best information for your concerns. We want you to get the most from your Android Forums time. Have fun.