Build BP3A.250905.014 prevents you from sending or receiving SMS messages, which prevents use of government (or social services) apps. How to undo?

Before *Android OS 16*'s last update (to build # BP3A.250905.014), it was possible to use programs such as *Google Messages* to send or receive **SMS** messages. But as of BP3A.250905.014, **SMS** messages sent to you (which are required to login to your government accounts, or to use social services, or bank apps such as *Well's Fargo*, or to login to your *Google* account if you are stuck with 2-factor-authentication) are not shown, and you can not send **SMS** messages:  . If you click "More ways to veridy", Google's 2-factor-authentication has an option to enter a code for account access, but [build BP3A.250905.014 breaks the input box (the text input which you enter the code into)](https://android.stackexchange.com/questions/262261/after-system-update-to-bp3a-250905-014-you-cannot-use-bluetooth-keyboard-to) . If you can disable 2-factor-authentication, that is a possible solution, but do not know how to. How to restore **SMS**? - Do you have to undo the update (roll back to the old version) to restore this ("Alt + Tab" switches)? Have the stock *Android OS* (not [**AOSP**](https://source.android.com/) , which includes sudo); is it possible to go back to the old version on devices without sudo? - Do you have to purchase a new phone (and remember to disable all processes related to "updates" / "provisioning" (and *Google* still asks, refuse those))? - If you can not refuse those: use without the **SIM** card (so *Google* can not force those), or [switch to a new **OS** (such as *Ubuntu Phone*) which allows you to use your phone](https://android.stackexchange.com/questions/57674/ubuntu-for-android) ?