I am using samaung guru( dous) from two years.this is a great phone for calling.the quality of calling is very high and no connection problem is in.look of this phone is very good.no heating problem in this phone taht is very good.battery backup of this phone is awesome.calling quality of this phone is very smooth.Speaker is very good and mic is also very good.it is a very good phone in this low price for calling.samsung company is always trusted only.keypad is very good and smooth.i was purchase it is 1400.there is no problem in this so far.