These are some of the things you must take note of to keep your SIM card working;
The SIM card should not be;
- Exposed to extreme elements – excessive heat.
- Removed Unnecessarily
- Bent or scratched
- Incorrectly Inserted
- Unused for more than 4 months, or else, the SIM card becomes deactivated on the network, you will never be able to use the number (SIM card) again.
Any of the above will render the SIM Useless.