This weekend, was standing right beside my sister with her Samsung S3 on the exact same provider network (Bell/Telus). The S3 had a stable HSPA+ connection with expected speed, while my iPhone 5 was stuck at 2-3 bars of 3G. Tried resetting the network settings, tried rebooting, tried walking around a bit ... Same results on both phones.
Called Telus this morning, and was told the iPhone 5 issue is "nationwide" but there is no expected timeline on when it will be resolved.
Then I called Apple for the first time. I explained how the phone only connects to 3G on the Bell/Telus network, informed them about the "nationwide" issue, but also mentioned the Samsung S3 side-by-side experience. The phone support person put me on hold for a bit to consult with a senior advisor, and then came back and offered a replacement phone. In their opinion, it could be a defective device.
However, I mentioned before how my current iPhone 5 reported a 4G connection while travelling in the USA last week.
So this can be ...
a) a Bell/Telus issue
b) a defective phone
c) both (a) and (b)
Will know more Friday after my Genius Bar appointment.
In the meantime, I see that Rogers has expanded its LTE coverage to more Ontario cities.