It's for the same phone or the API per browser or in Total
Example:
User with phone a try 6 time in 5 minutes
User b phone try 5 same 5 minutes?
TL;DR
Developers are asking for clarification on the rate limit for phone signups. They want to know if the limit is per phone, per API per browser, or the total number of attempts. For example, they are wondering if user a can try 6 times in 5 minutes with the same phone, and if user b can try 5 times in 5 minutes with the same phone.