Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
i did but its not workYou should be able to hold down the power button and force it to turn off.

i also do it a few minute but its mount data errorHello there!
Hope this helps?
http://www.hardreset.info/devices/myphone/myphone-rio-fun/softreset/
Edit: ninjad by 2 whole minutes!
1year the device . i also try the factory reset . the result is mount data errorSo a battery pull didn't help either?
How old is the device? If you cannot boot into the phone, be prepared to do a factory reset.
There are instructions there on how to do so, but be ye warned you will lose all your data/apps/pix/music etc.
Oh wow, that doesn't sound good after a factory reset.i also try the factory reset . the result is mount data error
nothing ive done that issue . its also a same as new that a buyOh wow, that doesn't sound good after a factory reset.
I would surmise there is a hardware issue then and may be time to think about either getting it repaired or replaced.
How old is the device?
Has the device gotten wet at all, or subjected to excessive moisture?
Has the device been dropped or otherwise damaged?
What have you done prior to this issue?
Well, is there a warranty that you can use? Maybe get a replacement?nothing ive done that issue . its also a same as new that a buy
1month warranty no replacementWell, is there a warranty that you can use? Maybe get a replacement?