Apologies if this has already been answered. I'm helping a charity with organising their comms and using Zoiper for our proof of concept.
The idea is that each of our volunteers would setup the app (free version) on their phone. Each member would login when they are on call, and logout (unregister) when they are done.
Although I can unregister, if I close down the app/lock the phone it immediately re-registers. This of course would mean a conflict with multiple devices trying to register.
Have a missed a setting which would stop automatic re-registering of the sip account?