You can use coinswitch (https://play.google.com/store/apps/details?id=com.coinswitch.kuber). I have been using it since last couple months after colodax was shutdown and it has been working good.

You have to show source of your funds though (just a normal form you have to fill — do you own wallet where funds came from? what's source of funds? and few others). I withdraw signature campaign earnings so I show it as freelance income.