I live in Sunnyvale, California. For those of you not from around here:
this is in Silicon Valley, aka the high tech capital of America. Within
10 miles, I see Yahoo, nVidia, IBM, Sun, Apple, you name it.

A year ago, I had Sprint PCS. The coverage they provided was terrible.
Before switching to AT&T TDMA, I evaluated all the carriers:
* T-Mobile -- tried a phone for a week and cancelled
* Cingular -- borrowed a phone
* AT&T GSM -- friend with a phone came over
* Verizon CDMA -- friend with a phone came over

Only AT&T TDMA and Verzion provided sufficient coverage.

I purchased a Nokia 6360 and AT&T TDMA service. I noticed a significant
improvement compared to SPCS.

However, service has degraded to the point where it is now "on par" with
the SPCS service I was receiving. Specifically:
* signal strength varies from 0-6 bars without moving the phone
* conversations are half duplex (I can hear them, they can't hear me)
* conversations are intermittently garbled
* calls are dropped

Last week, I borrowed a GSM phone (Nokia 3100) from an AT&T store in the
hope that service had improved over the past year. It had not. In areas
where TDMA signal was of medium strength, GSM coverage was weak. In
areas where TDMA coverage was weak, GSM coverage was non-existent.

I've tried in vain to get help with this. Nothing has worked. I've
called customer care numerous times, visited the stores in Mountain View
and Santa Clara, and nobody has been able to help me.

Things I've done/been told to do:
* power cycle the phone (doesn't help)
* reprogram my number into the phone (something like *#00031# +talk)
(didn't help)
* take my phone into a store (the store rep laughed at me, they don't
service phones)
* mountain view store rep: TDMA bandwidth is being replaced with GSM
bandwith.
customer care rep: no, that's not the case.
me: i'm in the AT&T store and the sales rep says otherwise. would you
like to speak to him?
customer care rep: no.
* had CC reps fill out numerous coverage feedback forms
* fill out the coverage feedback form on the web
* santa clara store rep: there are known problems in sunnyvale
customer care rep: there are no issues in your area

Nobody seems interested in fixing this problem. Everyone I speak to
gives me a different story, and all they seem to care about is passing
the buck and avoiding responsbility for addressing the issue.

Help!