I bought it and used it for more than a year. I recently sent a short message for more than ten minutes. The text message sent to me after 7 o'clock was received at 12 o'clock. What's going on here?

Is the network signal poor in your place? I suggest you try to find a place with better network signal. If the problem still exists, I suggest you update your mobile phone system or clear your mobile phone data three times. The three specific operations are: power off-press the power button at the same time on the volume-restore mode-clear data-clear all data (note: back up important data).