Each number (caller id) can only be used once you can read the FAQ
i know, but i ask different things, i'm not placing multiple calls using the same phone/caller id and happen that my calls are hangup without any reason, so i ask what i write above to try to find out what is the problem
as for how many different phones you can use to call that same number I have up to 5 with no problems so far.
do you use USA numbers?
Yes I use USA numbers as I am from the USA. You can generate up to 5 numbers but i have all cellphones call the same number and have no problems. Sometimes I have to redial as it will disconnect in beginning before i can enter pin but other than that no problems.
EDIT: also I keep noticing the amount of bitcoin per minute is consistently going down