Problem - Please Help!

Hey guys, looking for some help desperately. My phone is in really bad shape. It lags awfully, it's almost impossible to do anything. I can't tell if it's just the phone in general or the touchscreen causing the lag. The screen has a scratch on it but that never caused any performance issues and I manages to cover it up with a screen protector. I called T-Mobile and asked if I could get a completely different phone (while paying the price difference, I don't mind paying $50 or so). They said the only option is to have me send it in and whatever and maybe get a refurbished phone. RadioShack also gave me a similar offer. The problem is, I hate the Behold. The thing has lagged from day 1, getting worse and worse every day. When I play around on my friend's phones I am always astonished to how much better the performance is compared to my Behold. I just want to drop the touchscreen all together, and I'm looking at the Gravity 2 specifically. My contract is up in about a year, and I plan on canceling and switching to Sprint then. Any ideas on how to convince them to let me switch phones?

Gotcha, thanks. I think I'm just gonna hold it out for one more year and then switch to Sprint. My moms contract is up so I might just give her my Behold and buy an Evo. Who knows.

To be honest, I've always had problems with the Behold being laggy. I would even be totally fine getting a Gravity 2. No matter what happens, I'm switching to Sprint at the end of my contract, I never realized how cheap they are.

The only option that they gave me when I took it in/called multiple times was sending it in and receiving a refurbished Behold. I just don't want a Behold anymore, I've had enough.

Every time I go in/call, the only option they give me is to send it in. I wish they would offer me a Behold 2 though, lol.