google this 'define: EDGE"
Enhanced Data rates for Global Evolution (EDGE) is a digital mobile phone technology which acts as a bolt-on enhancement to 2G and 2.5G (a.k.a.GPRS) networks.This technology is working in TDMA and GSM networks.EDGE (also known as EGPRS) is a superset to GPRS and can function on any network with GPRS deployed on it (provided the carrier implements the necessary upgrades).
May be this answers the question that EDGE is tiny GPRS so you may not drop calls but the data could get stuck on 10 seconds
