I have used the new truecaller app just fine on my Lumia 930 (CV Germany), it works fine.
Then I got a special edition gold Lumia 930 (CV Hong Kong) and I found out that like the same issues you guys have, the caller ID does not stay turned on.
I put my sim (at&t) back in my Lumia 930 (CV Germany) and truecaller caller ID works just fine there, to be sure I even performed a factory reset on my 930 (CV Germany) and it still works, the caller ID stays on.
But when I put my sim back in the 930 (CV Hong Kong), truecaller caller ID does not stay on.
Does this have something to do with the variation in firmware? As I noticed that though both are Lumia Denim they are running slightly different configurations
Here's the info on both Lumia 930s..
my L930 (german CV)
Mobile Operator: 000-DE
Manufacture name: RM-1045_1012
Config ID: 1012.015C26
OS version: 8.10.14219.341
Firmware revision# 02540.00019.14484.37005
Hardware revison# 2.0.0.1
Radio Software version: 201c110.00039.0001
My Lumia 930 (Hong Kong CV)
Mobile Operator: 000-HK
Manufacture name: RM-1045_1044
Config ID: 1044.01B8EF
OS version: 8.10.14234.375
Firmware revision# 02540.00019.15053.26005
Hardware revison# 2.0.0.3
Radio Software version: 201c110.00039.0001
Do you guys advise I flash the ROM from my first Lumia 930 (CV Germany) onto my Gold 930 (CV Hong Kong)?
Since TrueCaller works fine on that model, if I flash its ROM on my 930 from Hong Kong, it should work right?
Thanks.
I hope this will also help others with same problem.
In the meantime, I have reached out to truecaller but they said it isn't their problem and has something to do with the Windows Phone OS.