If your 3G mobile network is not connecting, you can modify the 3G configuration settings.
How to configure 3G network settings on Asus Zenfone 4 Max Pro:
Step 1: Access additional settings.

Step 2: Choose the mobile network.
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Step 3: Select the access point name.
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Step 4: You can either select a different configuration or add a new one.
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That completes the setup. Wishing you all success.
