According to the reports, iPhone 5S, iPhone 6 and iPhone 6 Plus devices running iOS 8.1 or 8.3 on the T-Mobile network are affected. The issue is being blamed on an update pushed to the devices to enable Wi-Fi Calling.
Several possible fixes have been suggested:
- Disable Wi-Fi Calling.
- Hard reset the iPhone (simultaneously hold down the Home and Sleep/Wake button until the Apple logo startup screen appears).
- Delete old text messages from the past few days.
- Factory restore the iPhone using iTunes.
Users have had mixed success with these fixes, and it is likely that those affected will have to wait for an official fix from T-Mobile.
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