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In this article, Hoang Hai will guide you in detail on how to install the Au calling SIM configuration for Android phones (iPhones can be installed and used immediately, without needing to install additional configuration). The installation method is relatively simple, so you can completely do it.
Note: Must be done in a place with wifi

Step 1: Create a new configuration for 4G or 5G network as below:

For 4G
* Name: HOANGHAI
* APN: uno.au-net.ne.jp
* Authentication type: CHAP
* Username: 685840734641020@uno.au-net.ne.jp
* Password: KpyrR6BP

For 5G
* Name: HOANGHAI
* APN: uad5gn.au-net.ne.jp
* Username: au@uad5gn.au-net.ne.jp
* Password: au
* Authentication type: CHAP