On the behafe of my 3 month experience I am going to write this review.
opp f1s is the oritential phone that keep going making a good image in market.
this phone comes with 1.5 ghz processor and 3gb ram with will not it stope any where.phone have 32gb internal and 128gb exapandable by sd card.
the cemaras are very clear and good.in 40 days I make a albubm of 1400 photos by the phone.
front cemera comes with 16mp clear hdr and back cemera is 13 mb high focaus which will enjoy you to have grt selfies.
I have not face a minour problem till now.