SIM unlock; SIM lock cancellation
Refers to the process of removing a carrier restriction so a phone can accept SIM cards from other providers.
Before my overseas trip, I had my smartphone's SIM lock removed.
This model can be SIM-unlocked for free.
Common variant with half-width SIM.
Kana spelling for SIM, sometimes used in informal writing.
Compound of English-derived シムロック (SIM lock) and 解除 (cancellation, release).