Why can't I receive SMS while on a call on my iPhone?

“Thank you for your reply TheLittles. I do not have focus turned on in any mode. As I understand it that would only impact notifications, which is not the problem. Several SMS with code arrived simultaneously after the call ended. They were not in messages list until then with notification. “

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Thank you for clarifying.

Google these Forums:

Despite all that you’ve tried, have a look at what’s been asked by fellow users of these forums. Use this Google search query: iphone not getting messages until phone call ends site:discussions.apple.com

“Why can't I receive SMS while on a call on my iPhone?”

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Having been retitled by the moderator, I see how I’ve misread it, once more. So, try this Google search query: why can’t i receive sms while on a call on my iphone? site:discussions.apple.com

“unable to receive sms during a telephone call: I’m trying to complete tasks during telephone call Task needs SMS verification code but the sms does not come through until the phone call ends. This has not always been the case. Why has this changed?[…]”

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Getting Messages While on a Call:

O sure about “why the change?”, but you might be able to set this up using Focus. See this Post’s Reply: How to have texts go through during sleep focus - Apple Community

“Thank you for your reply TheLittles. I do not have focus turned on in any mode. As I understand it that would only impact notifications, which is not the problem. Several SMS with code arrived simultaneously after the call ended. They were not in messages list until then with notification.”

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Getting Messages Only After a Call:

I misread it. As for the answer, here is some stuff I find while searching for the possible answers on the Browser named Brave: