1. It may be a problem with software data or reading. It is suggested that you can use Security Center-Backup-Create a new backup-and then copy the backup file to Mi2. Just enter the security center and recover. The backup is saved in: sd/miui/backup/allbackup.
2。 Synchronize the address book of Mi 1 to Xiaomi account. Then bind the account in meter 2. Log in to i.xiaomi.com to recover data.
Thank you for your support and wish you a happy life!
You are welcome to ask questions on Baidu Xiaomi Enterprise Platform: /c/xiaomi/