Apple's top Siri tier reaches six of the 33 iPhone models that run iOS 27

A support agent taking a call about Siri's new expressive voices has to establish two things before answering: which iPhone, and which country. Either answer can end the call, and the handset can be brand new.

Line the lists up against each other and the two planning numbers separate. Thirty-three iPhone models run iOS 27 ^[1]. Fifteen of them clear the 8GB memory floor Apple Intelligence requires ^[5][6]. That leaves 18 models that install the OS and get none of the AI features ^[1]. Inside the 15, only six carry the 12GB that Apple's AFM Core Advanced model needs, so nine Apple Intelligence phones cannot run Expressive Voices or the advanced dictation system ^[9][10][2]. Six of 33 is about 18 percent of the supported models ^[3].

Those are model counts. The Tom's Guide rundown lists devices, not units in the field, so the share of your own users sitting in each tier is something you will have to pull from your analytics rather than from a compatibility list.

The second axis is geography. Siri AI is not available on iPhones and iPads in the EU or China ^[12]. Apple has repeatedly said the Digital Markets Act is holding up the European launch, and it has not commented on the delay in China ^[13]. Tom's Guide reports the hold-up is due to regulators not accepting "any of Apple's proposed solutions to bring Siri AI to the EU while safely supporting other virtual assistants" ^[14]. Apple's position is that its rules make for a safer environment, and the European Commission has reportedly disputed that ^[15].

So the grid has three memory rows (under 8GB, 8GB, 12GB) and two regional columns (the EU and China, then everywhere else). One cell gets Expressive Voices and advanced dictation: a 12GB iPhone outside those two markets ^[9][10][12]. The person that tier is built for bought one of the six newest iPhones and does not live in Europe or China ^[10].

If a Siri-dependent feature is on your roadmap, treat the fallback as the main path. Twenty-seven of the 33 supported models lack the 12GB tier ^[4], and in the EU and China the six that have it are excluded anyway ^[12]. The cost of designing that way is that the buyers who paid for the extra memory get a release whose two exclusive features are a set of expressive voices and a dictation system ^[9].