Worked great up until a year. Then like everyone has said, heating, spontaneous shutdowns, crazy lag or app crashes. If I would've known about this before purchase never would have bought this phone.
The lack of upgradable memory hurts this phone immensely. Apps will disappear from home screen because you have to move them to your SD card( which you have to go through the process of formatting) . Just not the worth the trouble for the amount of money. Bad phone unless it is short term.