[FONT="Comic Sans MS"][COLOR="YellowGreen"][SIZE="5"]salam for every one.

koi meri help karay ga mujhe sattelite earth station per job mili hai saudi arabia main..mujhe maloom kerna hai ke 2G aur 3G aur 4G networks main kya farq hota hai aur mujhe sattelite ka basic way bata dain please.....aur bata dain sattelite kaise kaam kerta hai..