Don't trust them. ATT LIES about the performance of their network(s). They advertise UPTO 1.4 Mbps for their 3G network. I have been testing it for two weeks now, logging my speeds.

I average about 130kbps. Top speed, ONCE was 640. I have run as low as 56 k.

They may as well say that their network is as fast as 8Gbps, since the values I have experienced are significantly under the "upper" limit.

Normally, I do not like being litigious, but ATT's approach is absurd.

I sure hope the iPhone 3G's problems with the power chip is getting sorted out with the software update. If the towers were getting overloaded before, adding these devices to the 3G network isn't going to help.

While I can understand dynsight's frustration, AT&T's HSPA network is capable of the advertised speeds. I have the USBConnect 881u, and routinely get 1.2 Mbps downstream, and often close to the same upstream.

AT&T is in the process of building out their network to support faster speeds in more areas. Take them to task for completing that effort sooner - but don't get litigious for the wrong reasons.

Rumors are that ATT/Apple is working on a tether setup with the iPhone. Owning an iPhone already would make getting a Mercury redundant assuming the rumor is true.

Anyone know the theoretical top download speed of an iPhone/tether combo? I'm assuming it something less than the Mercury solution?

I am not sure if this is the case, but remember there are 8 bits in a byte so if you are reporting 130KBs (Bytes) than that would be 1040Kbs (Bits) or 1.04Mbs.Boy that was lot of numbers, I hope I got it correct :)