Hi friend the mobile samsung galaxy j1 announced on january 2015 and released on february 2015.the weight of this mobile is 122gms.its supoorted both single or dual sim. The screen size of this mobile is 4.3 inches and resoultion 480x800 pixels.
The OS system is android v4.4.4 Kitkat is installed in this mobile.The internal memory in this mobile is 4GB and can be expended upto 128GB With 512MB RAM.Primary camera is 5MP with LED flash and secondary camera is 2MP.this mobile is amazing and also have many features that a good mobile should have.Nice to buy.