Celluar date connection are not available when during this call?

My iphone 5c with sprint won't let me use my 3G celluar data. When During a phone call

Obviously! LMAO

Verizon/Sprint/Virgin Mobile are all CDMA carriers… Data Usage during voice calls is a GSM (ATT/Tmobile/Straight Talk) ability… CDMA frequencies can't handle this…

complaints can be sent to the CEOs of Verizon, Sprint, and Virgin Mobile

Have a peachy day!