The iPhone 4 appears to have been the bestseller at both AT&T and Verizon during April, says Canaccord Genuity analyst Mike Walkley. The claim is based on unspecified "checks" of Apple business. He also observes iPad 2 sales appear to have been "very strong," although in both cases no precise estimates are provided. Apple, AT&T and Verizon all keep quiet about monthly iPhone and iPad sales as a rule.
