In meizu c9 phone which realise recently it having android version of 8.1 stock android with volt support its rate is 5000 but in meizu m3s android version is 5.1 and no volt its rate 10000 . Is it fair are we idiot's if u can able to change small budget phone with android 8.1 and volte why can't u change your older phone m3s with latest update.so you should give latest update with android version 8.1 and volt support.. check the meizu c9 for full details