"Please wait a few minutes and try again"

[ameenross]

I've been having trouble to register a new phone the past week. I've been getting some kind of generic error message that verification failed (I never received an SMS). Has there been an outage of JMP recently? In any case, whenever this error occurred, I got another error when trying again: "Too many attempts. Please wait a few minutes and try again."

I assume it to be caused by a brute-force prevention from the Kontalk server. However, it is not clear to me what exactly "a few minutes" is. I've tried waiting for more than half an hour and still get the same error. It is really frustrating to try this every 15 minutes or so only to find out the blockade doesn't actually last "a few minutes". Is it an hour? A couple of hours? And isn't it a good idea to put the exact time period in the error message?