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Help Please Help My 12yo Nephew! Cricket LG Risio H343

I've been rooting and modding my phones for a while with the help of many of you generous members, and I have always appreciated it, but now I'm here for my 12 year old nephew now. He has a Cricket LG Risio H343, which I know is similar to the LG Leon, but I'm afraid to take any chances with his only phone. As a typical kid he believed it when a friend told him he knew how to root it for him, and as usual the kid was bull of BS. So now my nephews phone just goes into a bootloop at the LG screen with a red message at the upper left saying:

Boot Verification Fail!!
Cause: MISMATCH_SIG_LEN

If anyone has seen this and knows how to correct the issue I really appreciate the help. I'm no developer but I know enough to generally be able to get by when rooting and modding my own devices. I just have no idea what this kid did to my nephews phone. At this point I would generally just get the stock KDZ and be done with it, but after hours of searching I can't find one for the Cricket model of this phone and I'm afraid to flash the wrong carriers files. Could anyone get me a link to the factory Cricket Risio H343 KDZ file? or direct me to one that actually exists. I really would appreciate any help you could give me, we can't afford to buy him a new phone for quite some time yet, so its important it get this working for him ASAP. So, please if anyone can help me, please let me know, because I don't know what else to do. Thank you in advance for any and all help you guys may share.





 

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