Unlocking a vintage Nokia 100 (Type RH-130) requires distinguishing between two types of "locks": the Security Code (used to access the keypad) and the Network Unlock Code (used to switch SIM carriers).
If your phone is asking for a security or "lock" code to access the menu or keypad, try these steps: NOKIA MODEL 100 TYPE RH 130 UNLOCK CODE
Find your 15-digit IMEI by dialing *#06# on the standby screen. Unlocking a vintage Nokia 100 (Type RH-130) requires
Unlock it, insert your SIM, and enjoy the simplicity of a phone that only does two things—calls and texts—extremely well. insert your SIM
Network unlock codes for Nokia phones are typically entered using a specific sequence of characters while no SIM card is inserted: Turn on the phone without a SIM card.