So I recently downloaded Onavo for my iPhone. It cuts down on your data usage by compressing cellular data on the fly. I guess it zips up the text and lowers the quality of images (I usually don’t notice, but sometimes I do) SprintPCS used to do this on their 1G(?) network and it was great.
I’m getting over 50% overall compression. It’s free but it’s likely they’ll eventually start charging (so try it now, while it’s free!). But if you’re just squeaking by on a 250 MB plan, this could keep you from jumping up to the next plan at $10 more a month, I assumed it’d be less than $5 a month(?). Most apps it’s compresses 70-80%, others no compression and some others at 30-50%. It works on the iPad too. It’s compression on the downloading, not on the uploading. It says that it has no effect on tethering.
I love it! I actually think it speeds my data up (if it’s only pushing half of it around, but they aren’t marketing it that way). It doesn’t touch secure data and doesn’t appear to touch your mail unless you specifically enable it (and it has to be MS Exchange); it converts your e-mails to text, but I actually think that’s better on the smaller screen. I did just change my gMail config to use the MS Exchange protocol to test it out (Google does support this); I’m getting 50+% compression.
I have the data unlimited plan so this isn’t such an issue for me, but I might be tempted to pay for a international data plan next time I travel. Although, now that I look at the list, I don’t see Costa Rica in the list, I thought it was there before…
I’m grandfathered in on the unlimited plan with ATT, but I have friends considering the iPhone 5 (4s?) whom 250MB might not be enough, but 500MB could certainly be enough. Sometimes I think it might be eating my data more, but I’ve been forcing the phone to stay on 3G and not join any WiFi networks so that I can see the savings.