[Keywords: Can't make calls, SMS working, Voice not working]
Just a quick warning to others.
I couldn't figure it out at first but incoming and outgoing calls would fail immediately on my PM phone.
Text messaging and data still worked like a charm. But phone gave a weird SIM read/network error every time I tried to make a call.
I seriously thought there was something wrong with the SIM or that I had mucked something up. Was considering testing in another phone and even doing a factory reset.
AND THEN I realized that it was my own fault.
I had forced the phone to a specific LTE band (using *#2263#*) to do some testing with Steve Punter's amazing LTE Widget earlier in the day and had forgotten that the phone was locked onto a specific LTE band and not falling back to HSPA, etc.
[For those who don't know voice calls on PM (and any non-VOLTE carrier) are connected using 4G HSPA (which is why the connection changes from LTE to 4G when you're on a voice call).]
Anyway, thought I would share my stupidity here in case someone else has the same problem.
I came ridiculously close to doing a factory reset!
PHT
