The EVO fan blog Good and Evo is reporting that simultaneous voice calling and 3G data is working on Sprint's HTC EVO 4G LTE. Some of you may be aware that unlike GSM carriers (e.g. AT&T), CDMA carriers (e.g. Sprint) are unable to serve voice and data over 3G simultaneously. So if you were on a CDMA device talking to someone, it would be impossible for you to connect to the internet. Verizon Wireless became one of the first CDMA carriers to offer both voice and data over its 3G networks when it launched the HTC Thunderbolt, early last year. However Sprint customers wishing to use both voice and data at the same time would have to opt for a more expensive 4G data plan.