When does perk 500MB data expire?

@Mike: Would that mean that if I applied it on the 90th day, it would expire on the 120th day? ... or is the 90th day the last day you will have data available to you?

Like others have said before me, you have 90 days to activate it. Once that is done, the 30 days countdown starts.

You have up to 90 days to apply the perk. Once you apply it, it will expire after 30 days. So if you apply it 5 days before the 90 day expiry, you still have 30 days of 500MB (past your 5 day scenario).

IMO , way too soon....

Apply it now to your account so it will be transfered to next month « rollover ». A storm, technical problem, forgetting or 3 days frozen account betwen monthly bill could prevent you from use it...
(As i did from my first perk)

You have 90 days to activate and 30 days to use it

You have 90 days to activate it, and even if it's activated on the last day before it expires, it is still good for 30 days

You can activate you perk anytime in the 90 days. Once activated it lasts 30 days.