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We opened our Huawei mobile phone, and then found the icon in the phone to enter the setting.
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After clicking to enter the Settings, we select the \"Wireless and network\" option in the page to enter.
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In Wireless and Network, we select the \"Mobile Network\" option to enter.
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After entering, we will open the option of \"volte HD call\" in the page.
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Once turned on, go back to the wireless and network Settings again and select \"Dual Card Management\" on the page.
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In dual-card management, enable the Internet access option during a call.