Overall: It have poor software and customer care do not response for its problem.
1. it get lock when make a call in 5 sec. and more over after some time its screen deactivate then all fuction are dead, for that first you have to activate screen, then unlock it and then disconnect call.
2. some time it get hage-up.
3. poor operamin
4. for incoming call your opition for silent and other are lock