Environment
Device: applicable to all
Question
How often do I need to clear FPLMN?
Can you advise on how can we implement automatic FPLMN clearing logic?
Answer
It depends on the use case.
A few general guidelines are:
FPLMN should not be cleared if network is working as expected.
FPLMN should be cleared when all available networks are on the FPLMN list.
FPLMN should be cleared when none of the networks not on the FPLMN list allows the device to register.
FPLMN should not be cleared excessively as the process is power-consuming.
Common scenarios include:
Clearing FPLMN after X number of unsuccessful registration attempts;
Clearing FPLMN upon device reboot;
Introducing a sleep mode in between attempts to preserve battery life.
Consult your hardware manufacturer for further guidance.
If you would like to learn how to clear FPLMN list - see this article.