This issue may cause headache to those who rely on a limited text plan. Considering the nature of previous reports and user feedbacks, we’ve gathered the possible fixes for this “iMessage sending failure” issue. So, no need to be frustrated. Follow these steps:
1.Check your network settings
iMessage works over your SIM card Data traffic/Wi-Fi network. Make sure the internet connection is stable. In case you are using Wi-Fi, make sure source/router is working fine. And if you are on mobile network, try restarting the mobile network.
2.Turn off and Turn On iMessages
Go to Settings > Messages > Turn Off iMessage and turn on it again.
3.Sign out and sign in Apple ID
·Open the Settings app in iOS and head to “iTunes & App Store”
·Tap on the “Apple ID: email@example.com” text at the very top of the Store screen.
·At the Apple ID management pop-up window, tap on “Sign Out”
·Sign in again
If the tips mentioned above aren’t fixing the iMessages sending failure error, do a reset.
Go to Settings > General > Reset > Reset All Setting