Question: what is e and h+?
Answer: E is an extension of GPRS, it is called EDGE and it is correspondingly a little faster, but still uses the old GSM network (2G). 3G, or UMTS and is the successor to the GSM network and faster. H and H+ are standing for HSPA and HSPA+. Both use the UMTS network, where H is faster than 3G and H+ is faster than H.