In a nutshell the difference is SPEED. The G in 2G, 3G and 4G stands for Generation, and they refer 2nd, 3rd and 4th generation of wireless technology. The newer generation is faster, more secure and more reliable .
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2g connection speed ranges from 20-40kbps . With this kind of speed, you could use applications which does not require higher bandwidth. You could use WhatsApp and other basic messenger apps, you could browse basic websites with simple code, say Google.15 Eyl 2015
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