If you notice that your LG Optimus LTE SU640 screen hangs and takes too much time to open any games on your device?

Perhaps because your smartphone is overloaded, and you have thought about restarting quickly to free up its RAM memory. The previous mobile phones come with battery removal options so that users can quickly take out the battery and insert the battery in case the smartphone lags. But nowadays, all the latest phones come with non-removal battery options. So you may think that restarting your device may be complicated.

This page will help you with three easy steps to reboot your LG Optimus LTE SU640 mobile phone.

How to reboot your LG Optimus LTE SU640:

Restarting LG Optimus LTE SU640 does not erase any data from your phone. In case you want to delete all data from your mobile phone, you can get a step by step guide here.

You should also note that you must know your device’s passcode for LG Optimus LTE SU640, as it will ask you for it when your mobile device is turned on again.

  1. Press & Hold the Power/Unlock Button on your LG Optimus LTE SU640 until you see your mobile device’s screen with a few options.
  2. Choose the Restart or Reboot menu among the various options on your LG Optimus LTE SU640’s screen. (If it’s asking for confirmation, press accept)
  3. Now your phone will turn off & on again to perform the restart. Wait for a few seconds, and now it will ask you for your mobile device’s passcode or fingerprint.

Once you confirm your mobile phone’s passcode on your phone, it’s successfully rebooted now.

Troubleshooting guide for rebooting the LG Optimus LTE SU640:

How to restart your LG Optimus LTE SU640 if it’s not responding?

Sometimes, your phone performs slow while playing a game or doing some heavy task on LG Optimus LTE SU640. You can not continue the current task on your phone. At that time, you will need to proceed with restarting your LG Optimus LTE SU640 using physical buttons.

Suppose you want to do a force reboot of your LG Optimus LTE SU640; press and hold the power button for at least 8 to 10 seconds until you see Android Logo or LG logo appearing on your display. Now release the button to let it start again.

Sometimes, your device is not responding even with physical buttons. You can not even force restart your LG Optimus LTE SU640. There are chances that your device has a low battery. The only solution in that case, is to connect your charging cable and try again.

If you still see LG Optimus LTE SU640 not responding even after following the above guidelines and you see it has entered into boot loop mode, it’s possible that there is some issue with your mobile device. You should take it to the nearest LG service center.

We hope this article posted on TheAndroidPortal.com about how to reboot LG Optimus LTE SU640 has helped you. Please share it to help more LG Optimus LTE SU640 users.

LG Optimus LTE SU640


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Marry Stuart
Marry is a content editor at TheAndroidPortal.com. She is an android developer and a mother of 2 children and love to live a geeky lifestyle.