Oppo f1s is best android phone for every use.It has best camera , good battery back up, large amout of internal space , and with 4 gb ram! , And also have a 0.3 sec finger print sencer , I m using it from last one year and I m telling u from 1 year it had not been hang for a single time. You can do multiple thing at one time without thinging about hanging of this phone. It has the features of iphone 7 plus at a cheap prise . It also support otg with the help of that you can use USB in your phone , it had also have external supportable up to 128 GB