Microsoft Lumia 640
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Lumia 640
Change settings
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Select help topic
Basic use
Explore
Change settings
Specifications
Change settings - Microsoft Lumia 640
Troubleshooting
I can't use my phone as a Wi-Fi hotspot
I can't use Wi-Fi
Sound settings
Select ring tone
Turn silent mode on or off
Display settings
Select language
Set date and time
Connecting phone and computer
Transfer files between computer and phone
Wi-Fi
Connect to Wi-Fi network
Set up and use your phone as a Wi-Fi hotspot
Bluetooth
Pair a Bluetooth device with your phone
Transfer files via Bluetooth
Data usage
Turn data roaming on or off
Turn mobile data on or off
View data usage
Software update
Update phone software
Restart
Restart your phone
Restore factory default settings
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