I don't know why the problems are
1. installs any apps randomly without asking2. ram gets full without using any application3. when ever I restart my phone the app named' Hola launcher ' isinstalled automatically4. The Apps like 'time service' , 'monkey test' and there is one moreapp not able to remember name5. Every time I open any browser this site opens automatically"http://m.alimece.com/?from=8093" don't know what it is. .6. battery drain faster even if phone is not in use7. Most annoying one is this"saavan ads" always pops in8. Every application restarts like for eg: when I zoom a image it zoomout automatically and screen blinks once like when application starts

what to do please tell. ..