Re: LTE is still 3G?
LTE and 3G are completely different incompatible animals despite Mobile Operator hype about their iHSPA and HSPA+ base station gear that runs over the 3G air interface. Just because a base station hardware can be reprogrammed to do LTE or WiMax on 2.6GHz (Clearwire) or 3G or LTE on 2.1GHz without hardware change at basestation doesn't make the systems remotely the same. Mobile WiMax is much more similar to LTE (assuming both are TDD or FDD versions. Mobile operators generally prefer FDD, different band for up and down links)
W-CDMA downlink thus suffers CDMA breathing
Four separate protocols over Air Link. GPRS, SMS, Circuit Switched Voice and IP Data
Fixed 5MHz channel (IPW is like 3G, but can use smaller channel)
OFDM on downlink.
Single Native IP protocol over Air Link and back to Central. Voice is using VOIP.
Various possible channel sizes up to 20MHz
You might as well claim that 3G doesn't exist as it's only a 5MHz combo version of 2.5G EVDO and 2G CDMA-1
You can't build LTE "on top of" a 2G Network.
1) GSM (UK's 2G) air interface is 200kHz channels with TDMA slots for traffic. Not remotely compatible with LTE. USA CDMA-1's 2G is 1.25MHz CDMA, also 100% incompatible with LTE air interface (There is also GSM in USA).
2) Existing UK GSM licences only allow GSM. Not 3G or LTE.