The Wall Street Journal, which kicked up the old iPhone on Verizon rumors (and iPhone HD!) again this week, now says AT&T doing everything they can to fix their network and optimize their service before any customers even think of jumping to Big Red.

First, they've very publicly acknowledged problems in cities like New York and San Francisco and invested in infrastructure to get them up to speed (and to stop the drop). In total, $2 billion will be spent building out the network.

However, dealing with the sheer volume of iPhone users on AT&T is an unparalleled problem, they maintain (and one many suspect would have plagued any single carrier).

For example, AT&T said when iPhone customers started checking their email and surfing the Web from their high-rise offices, AT&T repositioned its cellular antennas to point up, instead of down. Rivals will start the process of making the same changes only after the phones hit their networks, it said.

AT&T also spent a lot of time with Apple trying to fine-tune how the iPhone dealt with their network, and give the Cupertino engineers a crash course on wireless. They returned regularly and, according to the WSJ, helped with new technologies to "lighten the load".

Apple rejiggered how its phones communicate with AT&T's towers. As a result, the phones now put less of a load on the network for such simple tasks as finding the closest tower or checking for available text messages.

It's an interesting, if decidedly pro-AT&T article but well worth the read. If you're on AT&T, are you seeing actual, real world improvements? Would you jump on (or jump to) a Verizon iPhone if one is ever released?