Xiomi Redmi 1S is a very bad processor phone. It is given in its features that it has a processor of 1.6 octa core process but when you will use this phone you will get that this phone processor is very less that what is mentioned. Its os runs very slowly even in new phone. Sometimes it hangs for a long minute and you will have to remove your phone battery to run again it. Its recent app clear feature is not so good some of the app not close after clearing recent page.
So be alert
