How much data on the smartphone do you use each month? (iPhone, GPS)

[NJBest]

I average around 8gb. On some months when I travel a lot, it can be as high as 12gb. I rarely use Wifi. My phone's connection is actually faster than my cable modem.

[Zeurich]

Originally Posted by robertpasa

I pay for up to 3.0G but I only use about 2.4G each billing period. I only stream video or audio a little. Mostly Wikipedia and email.

If you go over the alotted amount, can you get no data at all until the next billing period, or can you use it but have to pay more?

I have 500 MB's I use more or less 250MB, some times it goes to the limit. If I bring my daughter to dance then I am hanging on my phone till she finish. My phone blocks internet access when 450 MB reached so I am not going over the limit, if you are over the limit you can use it but look at the web site of your provider for the extra charges.

[Peregrine]

With Android phones you can also set a warning at whatever level you want or set a mobile limit which will cut your data off.

Settings > Data Usage

I use about 2GB/mo.

[ZeusAV]

I usually average around 8-9GB. During a month where I travel it can be closer to 12GB.

[Malloric]

~10 gigs per month on my phone.

[Mr5150]

Two lines, two gigs. I love symmetry.
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And OP, with ATT and Verizon if you go over you just pay extra for the gig.

[nc17]

Roughly 20GB a month. I don't live in the US, but I'll probably return next year. I'm not sure which US carrier (if any) would allow me to use that much data for under $100.

[White Wine]

I have a 3GB plan and generally use ~ 2.5 GB a month.

[robertpasa]

Suppose you stream a video for an hour. How much data would that be on your bill?

[Skunk Workz]

Originally Posted by robertpasa

Suppose you stream a video for an hour. How much data would that be on your bill?

This depends upon the source and the quality of the video.

One well known example is Netflix:
Ultra HD would be 7+ GB, HD would be 3 GB, Low would be a few hundred MB.