Open the phone Settings and clean the phone memory.
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3. Problems with mobile phone Settings: Sometimes the security guard of the mobile phone will automatically prohibit some functions (such as recording), and the mobile phone audio access permission is not opened, resulting in the inability to authorize wechat voice.
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Workaround: Open Settings, find permissions, and set to allow access to your phone's microphone.
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4. Mobile phone system failure
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Workaround: Try restarting your phone.
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5, network problems: network delay or mobile wifi failure will cause wechat voice can not be sent out.
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Solution: It is recommended to wait for a while, the network can be operated, adjust the mobile phone network Settings.
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6. Software problems
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Solution: You can try to uninstall and reinstall to see if the problem can be solved. If you reinstall or not, may wish to try to upgrade the software, may be some compatibility problems, try to install the latest version, see if the problem can be solved.