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Originally Posted by Mr5150
??? AT&T has had this ability for years. Another example of "you get what you pay for".
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It's the nature of the technology used. AT&T and T-Mobile are GSM carriers (like 90% of the world) and so all of their devices can talk and surf simultaneously.
Verizon and Sprint chose to use CDMA technology which cannot provide data and voice at the same time. Once LTE technology came out a few years ago some companies started putting an extra radio in their Sprint and Verizon phones in order to allow the use of data while talking, Apple does not make such compromises with its iPhone. So up until the iPhone 6 in 2014, Verizon users could not surf and talk at the same time on their iPhones and Sprint users still can't.