How to Fix iMessages Won’t Send/Receive Problem in iOS 10
Actually, it’s one of iOS common issues after updating or restoring. And there are some quick tips you can have a try to solve this problem.
Tip 1. Check Network Connection
It requires you to connect your device to a stable Wi-Fi or Cellular Network.
Tip 2. Turn off and then turn on iMessages
Go to Settings > Message > Turn off and then turn on iMessages and try again to send iMessages.
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Tip 3. Restart or Force Restart
You can power off your device. If your device has no response, press and hold on both of “Power” and “Home” to force restart your device.
Tip 4. Reset Network Settings
This method will remove all Wi-Fi and Cellular network settings, including the password you typed. To reset, you can go to Settings > General > Reset > Reset Network Settings.
If all of these tips are useless for you, you may need to restore your device with iTunes backup or iCloud backup. Or wait for new iOS update to fix this bugs. And sometimes, Apple server issues will brings this iMessages problem, In this situation, you have to wait for several hours or days to get this issue fixed.