On Oppo smartphones with dual SIM, the SIM cards are named SIM1 and SIM2 by default. To make the SIM cards more easily distinguishable, the name of the respective cards can be changed as required. The maximum permitted length is ten characters.
- Open the Settings
- Tap on SIM card & mobile data
- Choose desired SIM card
- Tap on SIM card name
- Enter desired Card Name and confirm with Save