I'm having a major issue with my ZTE Warp Sequent. Can anyone help?

My ZTE Warp Sequent was just updated to Jellybean yesterday. After updating it started running slower, but as of this morning my phone was freezing and shutting off. In order to get it to turn back on I had to remove the battery, let it sit out for at least a few minutes, replace the battery and then try to turn it on. That would work after trying it a few times. Now my phone wont turn on at all. No water damage or any kind of damage to the phone. It's never frozen or done this until today/after the update. Please help!!! I've only had this phone for about 2 months and loved it up until this happened.

Same thing that happen to me I'm mad

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