In theory, it should. See the table in the related link to Wikipedia. Verizon doesn't use 700 or 1700 MHz - but does use the others you've listed.
900/1800
Verizon's Customer Service number is 1-800-922-0204. You can also dial *611 from your mobile phone.
Theoretically yes but you should make sure the unlocked phone you are transferring your SIM card into also supports the same cellular providers operating frequency. Its like this, every GSM cellular service provider operates in one or two of these possible frequencies 850/900/1800/1900 MHz. This will depends on the carrier and the country in which service provider operates, its usually 850/1900 in North America and 900/1800 in Europe and Asia. Most of the phones sold in the USA/Canada work in the North American frequency and not in other, so make sure your new unlocked phone works in the particular frequency for your provider.
No they are not a scam....they sell Verizon Fios subscriptions door to door. Not an easy way to make a living.
Only if it unlocked and support Quad band GSM 850/900/1800/1900.
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Basically, the difference lie on the frequency being used or supported. For GSM dual band phones, the frequencies that is can support are 900/1800 MHz or 850/1900 MHz; for tri-band phones, the frequencies are 850/1900/2100 or 850/1700/2100 or 900/1900/2100 MHz or 900/AWS/2100; and for quad-band phones, the frequencies are 850 / 900 / 1800 / 1900
Yes, you can use it in Germany, cect 599 is Dual Band Cell phone, supports 900/1800 HZ In Germany , the GSM used by most of the service providers is 900/1800 HZ, here is the table E-Plus Mobilfunk GSM 1800 O2 (Germany) GmbH & Co. OHG GSM 1800 T-Mobile Deutschland GmbH GSM 900/1800 Vodafone D2 GmbH GSM 900/1800 And most of the cect 599 on the market are unlocked, so you can use it
Any conducting material is a fine RF reflector. For example: Aluminum foil, or metal plate. At 1800 MHz, it doesn't even have to be solid. A set of parallel rods or pipes a few inches apart, or a metal screen, work fine.
SIM cards do not always work for any cell phone, as most wireless providers lock their phones to their specific network. Putting a SIM card into a cell phone locked to a different company usually triggers a service provider lock. Usually, the only way to get around this is getting the unlock code from the wireless provider it was originally used with, which they may not allow. In addition, some cell phones, usually CDMA, do not even have a slot for a SIM card.
1800
Any multiple of 1800 is divisible by 1800, for example: 0 x 1800 = 0 1 x 1800 = 1800 2 x 1800 = 3600 etc.