[myoon]

DSL frequency is usually between .25 and 1 MHz as that's what CAT1 was designed for, while LTE is usually sent over frequencies in the hundreds or low thousands of MHz. Shorter or higher quality runs of DSL lines can have slightly higher frequencies, but it's still not much.

[wmf]

You should probably compare the band width not the carrier frequency; AFAIK cellular uses 5-20 MHz wide channels and can aggregate multiple channels.