Cingular and AT&T have had a lot of issues with their customer service and GSM coverage. But in a way it just ups the game a bit. I just hope T-Mobile can keep up.
In my opinion concerning a few things, go with Coverage 1st...the merger will defienitly increase the GSM Network for the 2 companies, but the thing to keep in mind is that it is a "merger" in more than one context, and given the fact the T-Mobile, AT&T, and Cingular all have roaming agreements with eachother in select markets, it will be more of an overlapping of multiple cell sites, more so than a "expansion". The thing to add to this is the phone support, each company has shared phone tastes like SE T616 so it will come down to a re-vamp of ESN/IMEI's, so some head butting will happen, but should be a decently smooth transaction over time.
Next - Customer Service/Contracts...well we know how bad @ times CC can be...
AT&T and Cing have to also merge BILLING SYSTEMS!
When T-Mo did this, there were all kinds of problems and we have come through it with flying colors. People who are fed up of having a monster bill thrown at them for no apparent reason, but a system problem will come to the people who have it all figured out, T-Mobile! I have no doubt we will take this to our advantage and make it better for all of te consumers!