Rokkotsu The processor of because phone 2a and 2a plus is different and specifications have also changed like camera megapixel, charging watt nothing, the company pushes the update and then optimizes the processor and patches it It has to be done and it depends on the processor company like Mideatak, Snapdragon, that is why even if the phones are the same, it takes time to push the software update because of the processor.