BULLSHIT
Sorry Anon, I have to call Bullshit on your opinion, which are like assholes, we all have one yes? I also spent many years programing the various hardware that you climbers are always installing, removing, and replacing with whatever we are told to. Anyways, our 2G or GSM opperate on 800-950 Mhz , then we added 3G or UMTS which works on two bands, same 800-950Mhz, and 2.5Ghz -or- 2,500Mhz if you prefer, then we added 4G which is LTE, and it works on the same freqs as 3G but higher transmit powers and the modulation that you mentioned. Thanks for sharing WWG1WGA