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The missed connection rate of Nokia should be 1.0%. It won't leak often.

Give the landlord the following suggestions:

First of all, restart at least once or twice a day, which is the way for most mobile phones to avoid losing connection!

Second, there should be a short message character setting in the short message setting. Choose to support different roles! I haven't played Nokia for a long time, it should be like this!

Third, there are too many junk files in the mobile phone, which takes up memory! It is suggested that the landlord format the mobile phone! Is to restore the factory settings!

Fourth, poisoning is unlikely, but it cannot be ruled out. The solution is the same as three!