How to unlock a blu dash jr d139? - LG GT540 Cell Phone

life lesson you don't unlock the sim card you unlock the phoneoyp Unlock Mobiles

You have to call your service provider for it and they will help you when you prove you are the owner.

you need to contact your network/ service provider, they are probably the safest source for such assistance.

press the home key, volume key, and power key hold for 10-15 seconds, when screen changes only release power key and continue holding volume key and home key. A menu will appear on your screen just follow instructions to do a reset. Good luck

I hope this page has the manual download for your exact model
BLU Dash JR Device Manual and Service Booklets

With the dow volume button and power button. push them at the same time.

There should be an option to reset your phone in 'settings'.
Back Up and Reset should give you the option to reset with no problems. As you enter this option, the last option here is 'Factory Data Reset'. Try this and let me know what transpired after....

You may have to do a factory reset. Reply for info!

I wasn't able to find much online, but without seeing what the screen looks like upon receiving a call, I would imagine like most Androids, that you press and hold the green phone icon and slide it.