Use this page to identify software versions for the LG K40 as well as details on recent software updates.

 

 

Identify the device's current software version

 

Android 9.0/Build number X420TM10c

  1. From your list of apps, tap Settings > General > About phone > Software info.
  2. Review the information in the Review software version details section below.

 

Android 9.0/Build number X420TM10b

  1. From your list of apps, tap Settings > General > About phone > Software info.
  2. Review the information in the Review software version details section below.

 

Review software version details

 

VERSION RELEASE DATE ENHANCEMENTS STATUS

Android 9.0

Build number: X420TM10c

October 25, 2019

October security updates

Available October 25, 2019

If your device meets the update requirements, this update will be available to you to download. To prevent network congestion, updates are briefly set on a scheduled daily limit.  If that limit is reached, check back again the next day or after November 5, when the daily limit is lifted.

Android 9.0

Build number: X420TM10b

September 27, 2019

Original software

Available September 27, 2019

This is the launch software version of the device. When a software update becomes available, this information will be updated.

Other versions

N/A

N/A

Your device has non-T-Mobile software, and it is unsupported. The manufacturer and T-Mobile cannot update your software.

 

Determine update requirements

Your device must meet the following requirements to update your software to the most current version:

 

  • 50% or higher battery life
  • Data connection
  • File size: 115.3 MB

 

Update software versions

 

Update automatically over the air (OTA) for X420TM10c

  1. From your apps list, tap Settings > General > Update center > System update.
  2. Tap Check for update and wait while the device checks for updates.
  3. If an update is available, follow the on-screen steps to download and install it.

 

Update from a computer

  1. Download, install and open the compatible software for the LG Bridge from http://www.lg.com/us/support/software-firmware-drivers to your PC.
  2. Connect the device using the provided USB cable to the PC.
  3. On the device drag down the notification panel and tap USB notification >  Media device (MTP).
  4. On the PC, open the LG Bridge app.
  5. On the Software update tab, click Software update.
  6. If an update is available, a message will appear about the update. Click Start to install the update. Do not unplug the device from the PC until the update is complete.

 

Issues after updating

If you experience issues after updating to the latest software version, perform a master reset.

  Message us on My T-Mobile