HI letticiasant take your battery out of the lg optimus. Next you need to make sure your txts are not getting stuck. Send a test txt from your phone to your phone. Next you need to make sure your data network is not on the wifi. The wifi could prevent your txts forming going throught. Also refresh the network.
I’m happy to help further over the phone at
https://www.6ya.com/expert/ronald_e152e07e272e4f27
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