ok, if there are j3(2016) so it must be j5 (2016) and j7 (2016). samsung model name get worsen every years. imagine you want to buy secondhand phone, "for sale samsung galaxy j3", "im sorry, j3 original, j3 2016 or j3 2017", "nope, just j3", "so j3 original ?", "no ! it said J3 in the box". see ?
Just upgraded to the 3G Samsung Mythic. Should be set for the next several years.
"a 1.2 GHz Cortex-A7 CPU, 1.5GB of RAM"
Specs from the Stoneage?