I'm having a terrible first world problem: I want to use both Nexus 4 and iPhone 5. It's literally making me insane. I currently own iPhone 5 but each time I read Nexus reviews, I want to get Nexus 4. I can't use both as I have just one phone number. Perhaps I'll get Nexus 4 and just switch the sim card around. That's terrible. ARGH.
The Nexus 4 is too big, doesn't have LTE and the headphone jack is on the top (it seems like a minor nuisance, but being able to slide your phone into you pocket while listening to music is actually much easier with the headphone connected to the bottom of the device). Go with the iPhone 5.
Why is it easier to slide the phone into your pocket upside down than it is right side up? I've had phones with both styles, and I didn't notice a difference once I adjusted to the change.
I actually prefer the headphone jack on the top, because it's easier to use that way when the phone is plugged in.
As for size, once you get used to a larger screen everything else seems too small.
Switch your sim card over to Nexus 4. If you buy Nexus 4 unlocked, it can probably do out-of-the-box WiFi tethering (My Nexus One could but not sure if 4.2 stock android still has that feature preserved).
To use your iPhone 5, connect it to your Nexus 4's WiFi hotspot.
Oh, OK.. I just assumed that was common since the biggest carrier here in Norway does.
Costs ~5$ pr month though..
Gemini is the service for you to use two phones. You get an additional SIM card and can use both phones with the same subscription and the same number.
Both phones ring simultaneously on incoming calls.
Number will appear with any SIM card you use.
You decide whether incoming SMS to be sent to both cards.