I am using S9 and when I go to Contacts and under Me when I enter my mobile and save it, in a few days a new number automatically gets added and it becomes the default number. Every couple of days, I go to Contacts and press Edit and have remove the other number and Save it. Even after removing, the same number comes up again in a few days. Not sure how to fix this?
I've seen something like this happen @Deepak_Trehan when a person has been using a temporary mobile number assigned to a person while they Pac their own number in from another network.
The temporary number is still read by the sim card.
One measure to try and resolve this I've seen is for a person to ask their network to sim swap their mobile number and tariff to a blank sim card.
Current Phone ~
Samsung Note 20 Ultra 5G SM-9820 _256Gb SnapDragon 865+
Samsung One Ui 2.5/ Android 10.