G = 1G (GPRS) G stands for GPRS and is the slowest standard, used is the GSM network (2G). E = EDGE (2.5G) 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 = 3G 3G stands for UMTS and is the successor to the GSM network and faster. H (High Speed Downlink Packet Access) = 3.5G (HSPA+), HSPA 14.4 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. 4G = 4G 4G stands for LTE and is the fastest. INFO: Open the Applications tab and tap Settings. Tap Wireless Controls or Wireless & Networks. Tap Mobile Networks and then Access Point Names. Tap your APN setting. If the APN type is Default, then tap Menu and select Delete APN.