download mode

[Linh321]

All of a sudden I came back to my phone black out when i hold the power button for a little while there's a big grey sign with red bold fonts large saying download mode do not unplug charger until process is finish! I don't know what my phone is downloading but after 10 minutes i held down the power and volume button to have it rebooted! Did I have a virus? Phone was already up to date with 4.4.4

Posted via Android Central App with LG Google Nexus 4