Question [Q] Unlocked Rogers NOTE 3(N900W8) new added APN getting erased

I have unlocked rogers note 3(N900W8), and want to use it on Speakout.

I used the following 3 method:
1. Added new APN, saved;
2. deleted rogers APN rebooted.
3. use system/app mover + APN backup and restore),

A little while the added APN getting erased and back to rogers default 2 APNs(Rogers LTE and Tethering.)

Please help me how to get rid of default Rogers APNs permanently.

Thanks in avdance.