Mobile games and tasks

Hello. As I know, to complete tasks for PC games I must create new account through your site. It still works to mobile games if I played one of this before and some or one of the conditions below are met:
- before starting the task, the game was deleted and when I reinstall the game, I register in it from scratch, rather than use the saved progress;
- a case similar to the above, but I start the task again, because I previously failed to complete it on time;
- a case similar to the above, but I got one more task for one game after, as I completed one task for this game?
Or in all cases, in any case, I have to execute task from another device?

Not a suggestion, locking thread.
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