Why Wont My Htc Rhyme Shut Off

Hi,there please click to the link below for instructions.1.Insert T-Mobile SIM card and power on the HTC Vivid.
2.Unlock the phone using the circular slider.
3.Enter the code received from HT CSIMUnlock.com when you see the prompt, ”Enter the SIM network unlock PIN” and press enter or done.
At this time you should see a successful message and the HTC Vivid will restart. After the phone has restarted, go toSettings, selectMobile Network, selectNetwork Operators, press Search networks (T-Mobile & AT&T should pop-up) and then selectT-Mobile. Your phone will begin registering with T-Mobile’s network and will notify you when this is complete. You may have to reboot one more time, but other than that your phone has been configured for cellular use with T-Mobile. Next, you will want to add T-Mobile’s Access Point Settings so you can use your data plan on the Vivid. Go toMobile NetworkunderSettingsand follow these steps:
1.If there is a T-Mobile APN, touch it. If not, press the Menu key, and touch New APN.
2.Verify and update the following settings for the Data APN:
*.Name: T-Mobile
*.APN: epc.tmobile.com
*.Proxy:
*.Port:
*.Username:
*.Password:
*.Server:
*.MMSC: