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How do you reset a umx model u670c?

You may find the answer in the thread:

I discovered that I needed to hold down the volume UP button and power to get to the reboot screen on my UMX phone.  
... the back button. then select reset using the volume button. to ... be fast tho... it should reset.  
I did everything that it says to do all it does is stay at the triangle  
... then vol down to factory reset, (third line down) press the ... After you do the hard reset & you have a white screen ...  
Wont let me select with menu to rest phone  
my phone is on but it's just showing a white screen. what should or would i have to do next for it to come back on period?  
... volume button to select phone reset then you push the menu ...  
... volume button to select phone reset then you push  
... green message box on my u670c Android net 10 phone. It ...  
it goes to a white screen after i try to reboot it it goes to a triangle with a ! in the middle with a droid person than goes to a white screen than dont do nothing else  
... visit and he gave me a UMX mxc-570 phone for my ...  
... -looking menu. Navigate to Factory Reset using the volume down key ... 'service' button may differ on UMX Max (more often than not ...  

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