Seems there’s reports of issues with some providers and their cellular data not working following an upgrade to iOS 16 (which released today in Japan).
I use Mobal (which piggybacks off Softbank I think), and I lost all data capabilities following the upgrade and received the following email.
Those who haven’t yet, you might want to reconsider your upgrade before first contacting your provider as to whether they’ve tested and officially support it.
​
>Apple released iOS 16 yesterday and we have found that some customers are experiencing issues with data connectivity after upgrading. We are advising all iPhone users not to upgrade to iOS 16 at this time.
>
>If you have upgraded to iOS 16 and have lost data connectivity, you will need to downgrade iOS to version 15.6.
>
>There are various guides to downgrading iOS online, such as this one:
[**iphonelife.com/content/how-to-downgrade-software-versions-iphone**](https://www.iphonelife.com/content/how-to-downgrade-software-versions-iphone)
>
>We sincerely apologize for any inconvenience this causes and are doing our best to resolve the issue.
>
>Kind regards,
>
>The Mobal Team
Additionally, if anyone knows any good quick sim setups for monthly payments that work with iOS 16, please let me know!