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I didn't send a message. Why does the mobile phone display an error when sending information?

First, make sure your mobile phone is not turned off; Secondly, check whether your SMS center number is set incorrectly: 1, the SMS center number of China mobile users is +86 1380, and the three-digit area code is 0 (four-digit area code) 500. 2. Finding the number of Unicom Information Center is irregular. Here are two examples: China+86130112500 or 0086130112500 Shanghai+86/kloc-. 3. The telephone number of China Telecom Information Center is +86 138008 18500. If not, call 10000 customer service.