If you're referring to tribute LS660 or tribute 2 ls665, both are CDMA only phones and cannot be unlocked for GSM networks. Tribute 5 is a global phone and can be unlocked. Which phone do you have?
It seems your tribute 5 is bricked. You need to flash stock ROM to get it back to working state. Follow this tutorial to restore your phone
LG Tribute 5 LS675 Firmware Download - Unbrick Tutorial - LG Tribute Blog
You can but you've to create a folder "Music" in SD card via File Manager. Place all your music files in this folder and open Google Play Music to play.
I've tested it on another electrify 2 whose MSL is 000000. Actually in Electrify 2 (US Cellular) initially the MSL is 0 when its new but MSL changes once number is activated.
Can i use this script to get MSL for my Motorola Electrify 2 XT881? In Electrify 2 ##MSL# does nothing. First I've to dial #073887* send, then programming menu opens & I've to enter the MSL code and hit Verify. Or if there is some other method for Electrify 2 please let me know
Thanks