I use the same Carrier and plan as Kevin since Verizon's EVDO works at our 3 locations of City, Mountain and rural W. CO. Like Kevin, I don't exceed the 5 Gbit/month allocation. Yah, it's slower than DSL or Fiber Optic, but faster than Satellite. The ~23,000 miles up and down to an Equatorial Satellite [~46,000 miles total] means there's ~1/4 second delay per the speed of Radio or Light 'waves' [~186,000 miles/second]. This long delay 'latency' means you drop connections while doing lots of things, like timeout-sensitive, secure Banking or PC VOIP [Voice]. Cable, though faster, is also a shared resource of fixed bandwidth. This is why some Cable Companies are now limiting downloading of large file types that can hog bandwidth. Wired DSL is 'your' dedicated, unshared connection.
The FCC and other Agencies rigorously mandate frequency allocation. So, at peak times after Dinner, etc., more users share fixed bandwidth. All Wireless systems slow down during peak usage times, and Satellite can slow to no better than Dialup. Our slowest connection is our City location, since Verizon oversells Aircards for the Cellular 3G infrastructure now in place. 3G is good for ~1.2 mbit speed max. 4G[eneration] will be faster, but will deploy first in Cities, and along key highways. Rural locations will see 4G
eventually. Last night, this rural EVDO CO connection was 982k Download and 361k Upload. This morning, it's 720k Download and 766k Upload via Verizon on an American Tower ~3 miles away line-of-sight. News or Music Video 'burps' at these speeds, but that's an acceptable tradeoff. I'm not tethered to wire or fiber; not options at 2 of our 3 locations. Wire DSL slows with distance to the Central Office [C.O.]. We are ~12,000' away in the City, and Download was 390k to 432k on a 'good' day.
See here what users have to say about Carriers. Check the speed of pal's Aircards, or any wired connection, here @ n/c up to 3x day. Click on 'Tools', then 'Speed Test'. By testing your current online speed, you'll get some relative sense of Wireless Modem speed. Life's a series of tradeoffs...
http://www.dslreports.com/
American Tower builds Cell Towers and leases space for up to 3 competing Carriers. Find your nearest Tower at their Website via 'Site Locator', or use binoculars to locate one while driving to a campsite.
http://www.americantower.com/atcweb
A Mobile Phone can detect general Tower location. Hold your Phone to your sternum. Allow the strength signal in bars to stabilize for 30 seconds while facing all 4 quadrants: North, West, South and East. When the signal is strongest, the Tower is in front of you because the ~70% water in your musculature is not absorbing signal. You do not have to be talking or transmitting during this simple test. At low signal strength, your head 'soaks up' signal. So, you can appear to have 1 bar, and then lose the signal after dialing when you put the Phone to your head. Work around this by using a wired headset or wireless Bluetooth, and hold the Phone back - where most antennas are - toward the Tower. This test will also let you locate the Tower near a remote House. You may have to put your PC and Aircard near a Window, away from signal-weakening mass and metal. Verizon supplies a 'dongle' cable that lets you locate the Aircard ~2' from a PC.
Folks connect from 40 or 50 miles out by connecting a ~1.5' long Yagi antenna. ~3 watt Amplifiers meant for cars can extend Home range, too. See some 1900 mHz [1.9 gHz] Yagi Antennas here. 3 dB is a doubling of signal strength, so an antenna with 14 dB gain outputs a strong signal. The WiFi in a PC connected to an antenna around the Screen can be connected instead to an external, high gain antenna, but this is somewhat advanced stuff. A Bluetooth Phone can connect wirelessly to an external Car Amplifier and antenna. There's all sorts of neat stuff out there, including a box that docks your Cellphone at home. Wired Home Phones then ring in various rooms when a Cellular call comes in.
http://www.antennaworld.com/
The typical GSM System Mobile Phone outputs ~0.6 watts max. A Ham Radio pal might have to help with these advanced tricks. Some Phones with external antenna jacks make this easier, and the Verizon Aircard has a WiFi jack as well. However, their restrictive policies mean you can connect for free over WiFi to only Verizon WiFi locations. Various Chat Rooms online detail what fellow Geeks are doing to connect at long, remote distances via WiFi [>100 miles in one Australian competition]. Cellular, Aircard Wireless Modem and WiFi are not identical-protocol connections, but are nearly-identical frequencies. You can also use Skype to talk via PC, including superb Int'l call voice quality:
http://www.skype.com/intl/en-us/home
Depending on your Cellular connectivity, you can drop your Landline and wired DSL monthly charges, and drop any monthly ISP fees [like Earthlink]. Get e.mail via Wireless while untethered, and e.mail at 'gmail' or 'Hotmail' or 'Yahoo'.
While some might consider Mobile Phone/PC sophistication 'over the top' for Camping, our Real World experiences with loved ones in Nursing Homes, etc., dictate connectivity while 'getting away from it all'. Caller ID and Voicemail can filter non-critical calls [like Work calls ;-)]. I got hooked on
optional connectivity while filing mandatory Int'l Reports years ago from a lovely Hotel overlooking the Irish Sea w/Guinness in hand.