Hello! It seems like you're experiencing an issue with your WiFi device where it suddenly lost signal and displays "no service" even though the SIM cards work fine in other phones. Here are some possible reasons for this issue and steps you can take to try and resolve it:
1. Network Settings: Check if the network settings on your WiFi device are correctly configured. Make sure that the device is set to automatically connect to available networks.
2. SIM Card Slot: Inspect the SIM card slot on your WiFi device to ensure that it is clean and properly inserted. Try removing the SIM card, cleaning it, and reinserting it securely.
3. Network Provider: Verify if there are any network outages or issues in your area that could be affecting the signal reception on your device.
4. Firmware Update: Check if there are any available firmware updates for your WiFi device. Updating the device's firmware may resolve connectivity issues.
5. Restart Device: Sometimes a simple restart can fix connectivity problems. Turn off your WiFi device, remove the battery (if applicable), wait for a few minutes, then reinsert the battery and turn the device back on.
6. Factory Reset: As a last resort, you can perform a factory reset on your WiFi device. This will erase all settings and data, so make sure to back up important information before proceeding.
If none of the above steps resolve the issue, it may be a hardware problem with the WiFi device itself. In that case, you may need to contact the manufacturer or a technician for further assistance.
I hope these suggestions help you regain signal on your WiFi device. Good luck!
PH