What is the best cell phone for texting and internet surfing for a teen?

Right now I am with Sprint and hate my phone. In January I can get a new phone. At first I wanted the Sidekick Gecko but now I heard that T-mobile always drops calls and the internet surfing on the sidekick is slow. What phone would be best for me?|||The samsung glyde is the way to go for texting and for surfing the web. I've had my phone for about a month and it works great besides if your trying to click on web links . Everything else is great and texting is fast and easy. |||blackberry 8120 or the curve from t-mobile of course