noun
SIM-free (cellphone)
Wasei-eigo term for a mobile phone that is not locked to a specific carrier's SIM card. Often used in contrast to SIMロック (SIM lock).
wasei-eigo (Japanese-coined English), from SIM lock free
See also: SIMフリー
このスマホはSIMロックフリーだから、海外のSIMカードも使える。
This smartphone is SIM-free, so you can use overseas SIM cards too.