You're guessing... which typically results in misleading readers with false information.
Those who understand how cellular carriers and their networks work, know that you're in the dark about it. Let me provide you with the most basic of definitions to help out:
"Spectrum is the raw material on which wireless networks are built, and buying the spectrum now solidifies our network leadership into the future, and will enable us to bring even better 4G LTE products and services to our customers," Dan Mead, CEO of Verizon Wireless, said in a prepared statement.
source:
http://money.cnn.com/2011/12/02/technology/verizon_spectrum/index.htm?iid=EAL
.........He's actually 100% correct... and not guessing... and those that know how cellular carriers and networks work, know he's right.
You picked a very terrible quote as the entire basis of your response to him, which in no way explains what spectrum is outside of the fact it's needed - and that's where your understanding stops. There's different frequencies, and blocks within those frequencies, that are used for cellular service. T-Mobile uses PCS (1900 mhz, Band 2) and AWS (1700/2100, uplink/downlink, Band 4)... These are considered mid-spectrum bands, and are good for short distances and don't penetrate deep into buildings well.
Verizon & AT&T have PCS and AWS as well, sure... but they also have CLR (850 mhz, Band 5) and 700 mhz (the auction a few years back, Verizon with Upper C - Band 13 - nationwide, and AT&T lower B & C - Band 17 - nationwide). The lower the spectrum, the better the distance covered, the better the building penetration. This is why it's so vital for companies to have these lower frequencies.
Sprint has an enormous amount of PCS and are the exclusive owners EBS/BRS (2500/2600 mhz, Band 41 for them)... but the problem with 2500 mhz on up... is wet leaves, literally, lower your signal while standing outside... the same rules apply to your WiFi router and why 5 ghz wifi doesn't have the distance 2.4 ghz does in your own house... Sprint also bought Nextel, the sole owner of 800 mhz spectrum (Band 26) in the US... and their recent upgrades have focused on putting 1x Advanced for voice on this nationwide.
This is also why T-Mobile spent so much money on Verizon and AT&Ts 700 Block A spectrum... spectrum that has hard conditions to be met because of interference with UHF Channel 51 wherever it exists. Very real exclusion zones where it can't be deployed at all... they need lower spectrum bands to improve their coverage. Another huge issue is the lack of Band 12 (700, Lower A/B/C) devices, which is being remedied by AT&T shifting from 17 to 12 with future devices. You may also have noticed they are already active in the discussion around the new auction that are being prepared for next year... and why they want such tight controls on companies that already own a lot of lower band spectrum....