Can GSM and WCDMA/HSPA work together with LTE

Can GSM and WCDMA/HSPA work seamlessly with LTE?

LTE is an evolution of GSM-WCDMA and seamless mobility between these radio technologies is therefore built in to the 3GPP standard. It should however be noted that LTE is only operating in packet data mode, i.e. there is no circuit switch part for voice service etc.

A wide variety of user equipment is foreseen to be available with many supporting LTE and HSPA as well as EDGE thereby providing global coverage from day one.