How to reset or factory restore Telit t420 device?
Telit T420x is a popular rugged mobile device with various communication features such as voice, data, and IoT connectivity. Resetting or factory restoring a T420x device can be helpful in situations where the device is experiencing software issues, is not responding, or when you want to start afresh by deleting all data and settings from the device. There are multiple methods to reset Telit T420x, but the most common and recommended methods are:
1. Restoring from a service handshake image
A service handshake image is a pre-flashed software image provided by Telit to restore the device to its factory settings. You will need a valid service handshake image for your device and a host PC with a Telit SMART Client software installed. Here's how to restore from a service handshake image:
a. Connect the T420x device to the host PC using a USB cable.
b. Make sure the Telit SMART Client software is installed on the host PC.
c. Select "File" from the Telit SMART Client menu and select "Open Service Handshake Image" from the sub-menu.
d. Select the service handshake image file for your device and click "Open."
e. The Telit SMART Client will detect the service handshake image and start the restore process.
f. Wait for the restore process to complete.
2. Using the built-in button (Press and Hold)
You can also restore the T420x device to its factory settings by using the built-in button. Here's how to restore the device using the built-in button:
a. Turn off the device.
b. Press and hold the power button for 20 seconds until the "Reset" screen appears.
c. Select "Normal" and then "Yes" to perform the reset.
d. Wait for the reset process to complete.
Note: warning, when you press and hold the button, it will erase all data on the device, use it with caution.
3. Using RTerm (Telit Remote Terminal Application)
You can also restore the Telit T420x device using RTerm (Telit Remote Terminal Application) which accessed through SMS or USSD code to the device. Here's how to restore the device using RTerm:
a. Dial the USSD code #*#* and wait for the device to answer.
b. Enter "001" as the password and wait for the device to verify.
c. After the verification is successful, enter "2" to access the RTerm (Telit Remote Terminal Application).
d. Select "File" from the RTerm menu and select "Upload" from the sub-menu.
e. Make sure the handshake file is in ASCII format and has a file name "Telit".
f. Upload the handshake file to the device.
g. Wait for the restore process to complete.
4. Using a recovery box
A recovery box is a device that allows you to recover deleted files, restore a device to its factory settings, or flash new firmware onto a Telit device. Telit offers different types of recovery boxes, including T430x Recovery Box, T440x Pro Recovery Box, and T4620 Pro Recovery Box. You will need a valid recovery box for your device and a host PC. Here's how to restore the device using a recovery box:
a. Connect the T420x device to the host PC using a USB cable.
b. Make sure the Telit SMART Client software is installed on the host PC.
c. Connect the T420x device and the
