[Google Pixel 3 XL Questions & Answers] uicnren:
I will break my silence of not posting again, because you have no idea how these different phones work, differently.

Yes, the sentence is correct, and applies to both phones. Unfortunately for you, in this case, it is NOT the only sentence that determines how both phones work. It is only one aspect, not all aspects.

For the billionth time. We are not talking about USING the phones at the same time. In every example I have given the phones are merely sitting on a desk. Idle. Not in a call. Understand?

In this state, both phones will have radically different behaviors when a call is incoming. One (the iPhone) will ring if either number is called, provided the phone is not on another call already. This is a fact, regardless of the sentence you keep quoting. This is actually how the phone operates in real life, regardless of the line you quote from Apple.

The other phone (the Pixel) when sitting on the desk idle, not in a call, WILL NOT ring if the number associated with the SIM that is inactive is called, regardless of it being on a call already or not. This is a fact, regardless of the sentence you keep quoting. This is actually how the phone operates in real life, regardless of the line you quote from Apple.

I don't have to explain how or why, its a fact, that is how these phones work.

So lets look at the line you quote so gloriously and apply how it works in real life.

So iPhone is idle call comes in, you answer and are talking to someone. You have no idea there is an incoming call, as the opposite SIM is inactive (due to the phone deactivating it). That call is then handled by the carrier options that you have setup. When you end the in progress call on the phone, automagically the iPhone activates the inactive SIM. You won't know there was a call on the inactive number/SIM. The phone can now again, listen to BOTH phone numbers (which are different SIMs) for incoming calls, and as long as you aren't in a call, a call placed to either number will then ring the phone.

Now we go to Pixel. Call comes in (the call is really irrelevant, because the phone doesn't work like an iPhone anyway), you answer it and talk to the other person. You get a call on the opposite SIM, which is inactive (not due to the phone deactivating it from the incoming call, but rather because the Pixel cannot have an active SIM card and eSIM at the same time, like an iPhone can). That call is handled by the carrier options you have setup. When you end that call, nothing automagically happens, you won't know you missed a call. The phone will now go back to listening for a single number. If the inactive number is called, the phone will NOT ring.

If you cannot see how they are different, yet have the same line that you keep quoting apply, then there is really nothing left to discuss, but these are the facts.

There are also several other ways that iPhone can utilize the dual SIMs that Pixel cannot. Why? Because the Pixel cannot have the SIM and eSIM active at the same time, while iPhone can. In fact, the only time the iPhone CANNOT use both SIMs simultaneously, is when its in a call. The Pixel can NEVER use them simultaneously, regardless of in call or not.

To recap:

iPhone can listen for incoming calls, from two different SIMs/numbers at the very same time and have the phone ring if a call comes to either of those numbers (and as plainly stated by me, you and everyone else, that ONLY applies if the phone is not currently in a call).

Pixel CANNOT listen for incoming calls, from two different SIMs/numbers at the very same time and have the phone ring if a call comes to either of those numbers. Your phone will ONLY ring if the number called is active. If a call comes to the inactive number, your phone will NOT ring, nor would you ever know you had even gotten a call.

As for being wrong and foolish, I will leave that to you.