回複：買IPA4回國用，可以用衛星信號的。急需科普關於聲頻波段，3G,4G和LTE的關係

來源: 於 2012-11-24 10:34:09 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

Wiki is your friend in this case:

http://en.wikipedia.org/wiki/UMTS_frequency_bands

http://en.wikipedia.org/wiki/LTE_frequency_bands#Frequency_bands_and_channel_bandwidths

 

BTW, these are not '衛星信號', but radio frequency signal from ground towers.