How do I know if my phone is unlocked or SIM free? KH December 05, 2018 08:45 Updated Follow Please contact your mobile service provider. Related articles Can I use my device? I have Galaxy / Xiaomi / Nexus / Xperia / Or other Android device Model OOOOO. Is it compatible? Can I test my device? Do you provide device plans? I can not use SIM. What Should I do? Comments 0 comments Please sign in to leave a comment.