I don't know if it helps anyone, but for me it was Option #3 instead of #4 in your instructions. Thank you for your help.
Unfortunately I've been calling for over a week multiple times a day and either get the high call volume message or I wait 20+ minutes and then my phone will say "Call failed" and I'll lose the call. Frustrating to say the least.
This issue needs to be fixed for all of us!
