A:AnswerIn regards to the other answer you received, you can choose how many rings before the answering machine picks up. Up to 6 rings. I read that in other previous reviews. I don't have this phone but will buy it when I finish reading the reviews. Sounds like a good phone. Sorry I can't give you info for your actual question.
A:AnswerThere are only two ringtones. One for calls coming into the cordless phone direct. And another for calls coming in from the optional cell phone connection.
A:AnswerGood question. You want to spoof the outgoing Caller ID. I don't believe you can. The Caller ID information is generated by the phone company. The spoofers can do it but I believe they are using some kind of unauthorized hardware. This is a good question for AT&T Tech Support at their website (https://telephones.att.com) or call 1 (800) 222-3111 (in Canada, dial 1 (866) 288-4268).
A:AnswerThere is a "flash" button but I have no experience with it. Check out the manual (page 4):
https://att.vtp-media.com/products/DL/DL72XX0/DL72XX0_WEBCIB_i4.0_20210915.pdf
A:AnswerLooking at the manual, iOS is only supported for remote voice control (i.e., Siri). The Bluetooth section (page 17) on connection via Bluetooth only mentions Android phones. Seems odd to me also. Here is the manual link for reference.
https://att.vtp-media.com/products/DL/DL72XX0/DL72XX0_WEBCIB_i4.0_20210915.pdf