Samsung z4 this phone oparating sistam is tizen.
and this phone has 1gb ram and 8gb intarnal manorye and up to 128 gb.
and this mobile battrye 2050 mah.
and this nobile phone sound resipshone and qulaty is not be good and not so bad also. and phone not to be use friendly it has very heard opthion in this phone. and this phone style and dizing is not so good dut not bad this phone has manye of outher fitures and manye heard and new fitures this phone look nice tuch fill not shurp and smuth.vlue for monye it s ok not veary costly