What is the problem that iphone can't save SMS?

It can be solved in two steps. The first step is the system maintenance and mobile phone management of 9 1. There should be only one. A db file under /privatear/mobile/Library/SMS (used to store short messages). Don't worry, iPhone will automatically generate a new file for shutdown and restart. Step 2, reset the setting inquiry status of SMS center number: *#5005*7672# Setting number: *5005*7672* SMS center number #