Update the PRL (Preferred Roaming List) on your device for the Alcatel IDOL5 - Open Market
Steps to update the PRL on your Alcatel Idol 5S
Keeping your Preferred Roaming List (PRL) up-to-date can improve your network coverage.
1. From the home screen, swipe down the Status bar.
2. Tap on Settings.
3. Scroll to and tap System update.
4. Tap Update PRL and wait until it completes.
5. Tap OK.