4G is for Data. Voice and text (SMS, MMS) users don’t care about 4G. 4G doesn’t carry voice, except as voice over IP (VoIP) such as Skype and Vonage.

4G Technologies:

Long Term Evolution (LTE) WiMax
Standards Body 3GPP Institute of Electrical and Electronics Engineers (IEEE)
Vendors VerizonAT&TMetroPCST-Mobile Clearwire and Sprint
Spectrum 1.4 MHz through 20 MHz 2 GHz through 66 GHz3.5 GHz (international standard)5.8 GHz (US license-free)2.5 GHz, 2.3 GHz, 3.65 GHz
Download speed 5 – 12 Mbps 2 – 6 Mbps
Upload speed 2 Mbps 1 Mbps

3G download speed: 0.4 – 1.7 Mbps

3G upload speed: 0.4 – 1.2 Mbps

Cable modem download speed: 15 Mbps

Cable modem upload speed: 3 Mbps

Low spectrum: low bandwidth, greater distance and penetration

High spectrum: more bandwidth, shorter distances, blocked by obstacles

What RF Frequencies does WiMAX work in?


iPhone 5 and 4G: So if 4G is for data, can I do voice over CDMA while doing data over 4G? No.

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