Review: It’s not an iPhone 5, but so what?

To some people, Apple’s new iPhone 4S isn’t the complete overhaul they have been hoping for. its model number, which doesn’t include a “5,’’ reeks of the status quo.

Sure, the 4S doesn’t render the iPhone 4 hopelessly obsolete, and on the surface they’re nearly identical. but with a faster processor, new software, a voice-activated personal assistant and a souped-up camera, it’s a major improvement over the current iPhone.

The 4S will be available Friday in black or white. It will cost $199 to $399, depending on storage space. It requires a two-year service contract with Verizon Wireless, Sprint or AT&T.

If you have an older model such as the 3GS or are thinking of making the move to the iPhone, it’s an excellent excuse to buy one.

The coolest new feature on the 4S is Siri, a software-based personal assistant who responds to your voice in a somewhat robotic, yet soothing female tone.

Siri can do all sorts of things, from setting your alarm clock to finding a good local sushi joint to playing DJ with your music. she can’t bring up specific websites, but she can search the Web for pretty much anything.

Once you let her know who you are and where you live, she can even do complex tasks such as reminding you to call your boyfriend when you leave your house.

She can understand conversational English, which is great because it let me speak as I normally would (though I did have to enunciate well). this means you can say things like, “what’s happening today?’’ or “what’s going on today?’’ and she’ll let you know what’s on your calendar.

She’s also a dictation dynamo, transcribing emails and texts much better than a phone running Google inc.’s Android software. It would be awesome if she could intelligently insert punctuation marks, but she does get them if you tell her “period’’ or “exclamation point.’’

For a particularly difficult test, I read a random paragraph from a copy of “The new Yorker’’ to the 4S and to an Android smartphone. Siri didn’t get all the words correct, but she overwhelmingly beat the competition.

Of course, after spending all this time together, I wanted to know all about Siri. I asked her a bunch of personal questions, with mixed results. her favorite color is something she doesn’t know how to say in English — “sort of greenish, but with more dimensions.’’ she changed the subject when I asked if she was seeing anyone.

Note for foul-language fans: Siri understands profanities, but she may chastise you. she did this to me, so I asked whether she had a problem with my language. she told me to get back to work. I apologized.