The instructions on this page offer "Use iOS devices where the ambient temperature is between 0º and 35º C (32º to 95º F)."

Hopefully Apple is just being cautious and giving a range where they're confident no one will have problems. But if not, that's a pretty narrow range. I've had problems with music players and Android phones down at <5F, certainly, but <32F is the one part of this that looks like an Apple-specific issue.

If you look at the manual the other devices probably have similar specifications.

It's not just phones.

The Toyota Prius is also vulnerable at extremely low temps. From the owner's manual: "When the hybrid battery (traction battery) is extremely cold (below approximately minus 22 degrees Farenheit [minus 30 degrees Celsius]) under the influence of the outside temperature, it may not be possible to start the hybrid system. In this case, try to start the hybrid system again after the temperature of the hybrid battery increases due to the outside temperature increase, etc."

edit: of course, gasoline-only cars have a similar problem. Oil gets THICK at -22F and without an electric engine block heater, the starter may not be powerful enough to turn that engine over.

At least you can put a phone inside your jacked to warm it up. Not so easy with an automobile.

My understanding is automobiles will use some battery power to simply keep the battery in an ideal temperature range. Maybe phones could have the ability to burn a bit of energy in cold weather to simply keep the battery warm, if desired by user.

I've never had a problem with my phone when it's been below freezing out.

This may be obvious, but when it's cold out, it helps to keep the phone in a warm pocket close to the body (e.g. on the inside of your coat) rather than a bag or so. I've never had any issues with iPhones that way; using it for more than a short period of time when it's very cold is unpleasant anyway, so it never gets the chance to cool down too much. (I can confirm this works even at -40°, although you've got to be very careful with charging cables at that sort of temperature. Don't try to bend them, they'll snap.)

I had a lot of problems with my 4S spontaneously shutting down when snowboarding (when it was still pretty new) until it occurred to me to store it inside of my jacket rather than an outer pocket.

So not Canada, half of the year?

iPhone from 6 and up are notoriously bad at cold weather. Previously people talked about reduced battery life in cold weather, but it was never really a big problem (I guess the batteries were thicker). But with the iphone it drops from 80% to 5% then dies in a matter of minutes. People I know have been talking about it and I dont go out on a cold day with the battery at less than 50%. Which was never the case before, even with iphone 5.

Edit: now we are talking temperatures below -10c

I've seen people with 30, 40% batteries iphones die for no apparent reason. My samsung in the same temperature not shutting down. Theres plenty bad things to say about apple. This one i can confirm