Whenever I turn off or restart my mobile phone, there is always a short message of 10086 sent to me! Said that my phone bill balance last month was less than five yuan! I didn't lock it.

I met a situation similar to yours, that is, my friend sent me short messages, and I always received dozens or twenty repeated short messages. At first I asked my friend, do you have much money? I also suspect that my friend's mobile phone is poisoned. Later, I found that every text message sent to me was the same, so I doubted the mobile server again and called 10086, saying it was no problem. That's your cell phone. Later, I restored the notebook to the factory settings, and the problem was solved!