Cloud SO Forum My mobile phone is Tianyu W688. After using it for a while, I can’t send text messages and can only receive text messages?

Hello,

1. It is recommended that you try to change another SIM card, or try after setting the SMS center number. If your mobile phone is an Alibaba Cloud system, the mobile phone does not come with a SMS center. For the number function, it is recommended that you take out the SIM card and put it in another mobile phone that supports this function to set it up and then put it back into this mobile phone. You need to contact your SIM card network operator for the SMS center number.

2. If the above method cannot achieve normal viewing, it is recommended to back up important data in the mobile phone and restore it to factory settings or contact Tianyu National After-sales Service Center. The address of Tianyu National After-sales Service Center is:

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I hope the above reply will be helpful to you, thank you for your support of Tianyu products~