Now that AT&T‘s exclusivity with the iPhone has ended now that there is a Verizon iPhone, you’d assume that this will hurt AT&T’s business. We now have recent data to tell us just how much.

“A total of 16% of AT&T subscribers say they’ll switch to Verizon once it begins offering the iPhone. Another 23% say they don’t know if they’ll switch.”

“Importantly, current Apple iPhone owners are the most likely group of all to switch, with more than one-in-four (26%) saying they’ll leave AT&T for Verizon.

Note that among all AT&T subscribers planning to switch, two-in-five (41%) say they’ll do it within the first three months of the iPhone’s release – and another 31% within the first year.”

These don’t seem to be that bad just yet. Maybe AT&T users are just wise to simply wait for the iPhone 5 launch (or iPhone 4GS) this Summer until they switch. How about you? What are your plans?