I lost the device or parts (things other than the return envelope, such as Pocket WiFi / SIM card / Cable etc...) SakuraMobile December 05, 2018 09:46 Updated Follow Please contact us immediately. Related articles How much is the compensation if I lose/break devices. I lost the return envelope. How should I return it? When monthly fee is charged? Do I need to return SIM card upon termination? Can I go to your office and make a contract? Comments 0 comments Please sign in to leave a comment.