Home / LG Optimus LTE SU640 / Soft Reset
How to Soft Reset — LG Optimus LTE SU640
How to Soft Reset — LG Optimus LTE SU640
The LG Optimus LTE SU640 is a 2011 Android 2.3.5 smartphone powered by the Qualcomm MSM8660 Snapdragon S3 with 1GB and 4GB internal storage. It features a 4.5", HD-IPS LCD, 720.0x1280.0 display and is available in Black, White.
The Optimus LTE SU640 is equipped with a Removable Li-Ion 1830 mAh battery, a 8 MP, 1080p@30fps main camera, a 3 MP front camera. The device uses a Mini-SIM configuration. It weighs 135 g.
Performing a soft restart on your LG Optimus LTE SU640 is the quickest way to resolve minor performance issues, app freezes, or unresponsive touch screens without losing any data. Unlike a factory reset, a soft reset simply reboots the device and clears temporary memory, making it the recommended first step for any troubleshooting.
Does not erase any data. Always try this first.
On your LG Optimus LTE SU640: hold Power for 2 seconds
Tap 'Restart' or 'Reboot' in the menu
Wait ~30–60 seconds for the restart to complete
Force restart if frozen: hold Power for 10–15 seconds until screen goes black
Device reboots automatically — no data is lost
Was this guide helpful?