Recover Missing WeChat Messages From iPhone Due To iOS 9.3 Update

I updated my iPhone to iOS 9.3, but after that, wechat messages on my iPhone were gone. What happened? I did nothing. Can anyone help me to recover my missing wechat history on iPhone due to iOS 9.3 update? Please help me. Thanks. iPhone 5s, iOS 9.3 It is quite common that when updating to iOS 9.3, some data like wechat messages from iPhone are lost. I guess it is because the data base of iOS 9.3 is a little different from the previous iOS version. Also, you may have done something wrong ...