Unhappy Lg f240l in boot loop

Hi there,

I recently bought a used Lg f240l (so no warranty at all). Every thing was working fine and dandy but today when i restarted the phone it went into boot loop for like 15-20 minutes. I did a battery pull and rebooted but still it remained in boot loop. So i googled and found how to factory reset the phone , i reset the phone. It tool 15-20 minutes again to format but the mobile network signals were gone. I shutdown the phone to check the sim card . I restarted the phone but it went to bootloop again. Please help me out here.
I am aware of custom recoveries, root, etc but please dont hesitate to answer this question like I was a noob.
Also is there a possibility that the factory reset may cause a sim lock?

Thanks alot.

FIXED IT...
THE SOLUTION: In case any one googles ...

So i recently replaced the default fonts with htc m8 but fortunately i backed up the fonts folder.
I hard reset the phone by pressing and holding volume down+home button+power button
And when the phone booted i simply replaced the fonts folder.

I dont know why this happened but this solved my problem.