For hosting pocketmine server? Probably never. I'm not qualified to give you final verdict as I don't know what exactly is incompatible, but I won't give you hope. Don't expect the support to come.
16GB Storage with 2GB RAM Octa-core 1.4 GHz Cortex-A53 CPU PMMP however, does recommend a dual-core cpu or better, which Cortex A53 does, I believe. But, the ram and storage on the other hand, is very...bad! I recommend running on a PC, not your phone.
If you meant playing the game on your phone, yes it's possible if your phone supports joining servers!