Originally posted by Gleevec
AT&T, for example, has extended area coverage (which, unlike roaming, is free) where other cell towers are used. I have never had to roam and I have driven through some very rural parts of Texas.
So I guess the moral is all major cell phone companies will give you good coverage, price is the only real concern then.
As for coverage, it really depends on the company and where you live. Each company has local calling area plans (which will usually give free roaming throughout the state) and national plans (which will give you free roaming throughout most of the US or the entire US. Check with the carrier and plan to see the coverage area.
As for roaming agreements, it only works depending on the type of technology the carrier uses.
Verizon uses CDMA digital technology and has the largest nationwide network that performs the best.
Cingular uses TDMA digital technology and has a natiowide network that is just as extensive as Verizon, but with different technology so cell phones can't work on each other's networks, thus no roaming agreements.
AT&T uses TDMA digital also, so if you live in area that has both AT&T and Cingular, coverage should be good. AT&T and Cingular and both are upgrading to GSM technology (the most widely used technology in the world for wireless phones) right now and have extensive roaming/network agreements with each other.
Sprint PCS uses PCS technology, a type of CDMA technology and does not have a large amount of coverage compared to Verizon or Cingular.
Nextel uses iDen technology that is completely different from everyone else. As a result, their coverage sucks.
T-Mobile has the smallest amount of coverage both nationally and locally in most areas because they are GSM only. GSM is a great technology that allows for cool phones like the ones that can send pictures and stuff at high speed (unlike Sprint whose speed is slower), thats why T-Mobile has the coolest phones. T-Mobile will improve dramatically once AT&T and Cingular complete their technolgy upgrade to GSM in the next 2 years. T-Mobile really lucked out when those 2 companies decided to upgrade to GSM. All 3 have roaming/network agreements for GSM together. Remember when they were called Voicestream and before that they were that company with the pink alien (I forgot the name). They have a chance for survival now.
In terms of nationwide customer base, this is how the companies rank:
1. Verizon
2. Cingular
3. AT&T Wireless
4. Sprint PCS
5. Nextel
6. T-Mobile
There is a reason for the ranking, so pick your provider carefully...don't go with a company just because they carry a cooler looking phone.
Nobody probably cares to read all of this, but I'm sure it will help some of you decide which provider to go with.
In South Florida, go with Cingular...its has 50% of the market cornered, the other 50% is split between the other 5 companies. And don't get the GAIT phone. Get a TDMA phone with a 1 year contract, and by the time the contract is up, the GSM technology will have matured and that would be the time to get a GSM phone.