I had extreme lockup issues with my first zte warp. No consistent pattern, but it would do the same every time, whatever app, most frequently miren browser, google maps - the screen would just freeze, then I press the power button, when after quite a while, the screen gloes black, the red led turns on. The only way to get it to work again, is to open the case ,remove the battery and replace it, then power up again.
I called boost customer service , they wanted me to call zte warranty line, however, they gave me the online sales team's number, there a very helpful person named Alpa helped me, got approval from headqquarters for rma with paid shipping. Fedex picked it up Tuesday morning.
I received my 2nd zte warp via fedex on Monday 12/14/2011.
I charged the phone fully before calling customer service, they activated the new phone and I was calling etc in minutes.
Now for the bad news, the 2nd zte warp is locking up randomly exactly like the first, I did what blue2107 suggested, it worked fine for a while, then today, it has locked up twice already, both times while using miren browser.
I have a sinking feeling this phone is not ready for market. Problem is, there are only 2 other prepaid phones I would consider, 1. LG Esteem - MetroPCS, 2. Motorolla Triumph - Virgin. I've read nasty things about the Motorolla, seems its a Huawei in disguise - I just had to buy my daughter a new phone because her Huawei was so bad, it never has reception. That leaves the LG, but MetroPcs's "4G" is more like other carriers 2G, plus their coverage is sparse.
I still hope someone comes up with a solution, as I really like this phone otherwise.