(SOLVED 5/10/2024): [My solution post here.](https://www.reddit.com/r/japanlife/comments/1cn19g3/comment/l3e6dt9/) Not sure if it’ll help others figure things out but hopefully it does.
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Pretty much just everything in the title.
A few months ago I was totally fine, now I’m suddenly unable to make or receive any calls.
I read here that they made some changes regarding 3G but even when prioritizing 4G and updating all APN settings I still can’t make any call what-so-ever 😢
by After_Objective_9205