That's another thing which I'm illiterate about.
I am not sure what is CDMA, GSM, GPRS etc..etc.. I am using internet only on the PC, not on my phone.
What difference does it make to the end user ?
I too am not too technically sound.
My comments+observations as an end-user :
a) CDMA/ GSM are technology names.
b) GPRS/Edge/3G/4G LTE denote the bits/kilobits at which internet is provided to you.
c) Generally 3G/4G provide reliable speed/internet connections.
But these USB dongles are quite expensive when compared to the cable broadbands.
USB dongles maybe useful for a person who is on-the-go, but if it is for a trader working out of a single office/ home-office, it would be cheaper to buy another cable broadband for a back-up