[Q] Annoying notification about Service Update every time after boot the phone topic

Hi.

I have a Sprint M8 but live in the UK.
I have been using custom rom since last October and I enjoyed them.
Yesterday I backup all my data with Titanium Backup and then upgraded the correct firmware to android 5.0 Lollipop. Afterwards I installed the InsertCoin Rom Sense 7.

Everything is fine before I restored those data from Titanium Backup.
After I restored system data and reboot into the system, it seems to be OK. But after several seconds, a notification pop-up, saying:
Service Update:
The operation is not allowed under GSM network, please switch to CDMA network.

I can only click OK and then it seems normal.
But the problem is every time I reboot the phone, this notification appears. It is really annoying. I am wondering if there is any way to permanently disable it?

I have been using InsertCoin and ViperOne rom on this phone before, and it works very well with Titanium Backup. Previousl, this notification did not appear after I restore data with Titanium Backup.