If you previously opted to freeze your account, you can unfreeze your account following the steps below after verifying that your account is again secure:

Open WeChat > Tap More Options > WeChat Security Center > Unfreeze Account > Unfreeze, and follow the instructions.

Note: 

1. Do not attempt to freeze or unfreeze your account too frequently or your account may be permanently frozen for security purposes. Once your account is frozen, you will not be able to use your account until you have chose to unfreeze it. After unfreezing your account, reset your WeChat password and enable Account Protection to further secure your account.

2. For account security, after unfreezing your account and log in to WeChat successfully, go to Me > Settings > Account Security > Manage Devices and delete any unsafe devices from the list of prior devices. For your account security, you may need to verify your identity when you log in again from the deleted device.

3. If you are unable to unfreeze the account, tap https://help.wechat.com/cgi-bin/micromsg-bin/oshelpcenter?opcode=2&lang=en&plat=ios&id=1706233YZbEf170623yA3e67&Channel=helpcenter