iPhone 6 and 6 Plus pre-orders were delivered last week and that means package tracking apps were busy. Now that people have their new iPhones is there anything to be learned from the shipment data?

Yes, according to Slice, which aggregates information from its package tracker app: AT&T accounted for nearly half of all U.S. pre-orders among those who used Slice to follow their handset shipment while iPhones compatible with T-Mobile’s network out-shipped those for Sprint’s by a factor of five.

Apple’s iPhone 6. Photo by Tom Krazit/Gigaom

The data from Slice — one of my favorite apps for Android and iOS — literally is a slice of all [company]Apple[/company] iPhone 6 and 6 Plus pre-orders: The data can only be captured by those who used the app to track their iPhone shipment. The sample size for Slice’s data is 13,055 U.S. consumers; a small portion of the 4 million pre-orders but…