problem turning on my phone

[yunior]

hey guy i have a problem with my phone, i was wondering if you guy could help me. my previous phone broke and i had to change it cus the keyboard went bad. the had to give me a new one. i had this new one for 2 months now and is giving me a lot of problems. the major problem is that the keyboard sometimes doesnt want to work. and other times it works like nothing. the other problem is that it freezes, so i have to turn it off or sometimes do a soft reset to be able to use it. but the bad part is that when im turning it up it would get stuck in the green screen and wont boot. so i try turning it off and on the it resets itself to new. this is the second time i lost all my information. i was asking you guys if you have any ideas before i go again to the store to change it. thank you very much