I phone 5s is one of the best phone from I phone it has many features.great app, sounds nice, no need of any antivirus app, siri, well designed, good space of memory.nice and beautiful colour.easy to operate, and you can also get it online easily.it has 1.2 mp front camera 1 GB RAM.its a complete smart phone, 1.5GHz core.the apple iphone is a single sim that accepts nano sim.connectivity supports wifi bluetooth, 3g, 4g