Try asking on the sprint forum.
You may have more luck..

 

Where are you located and who is your mobile service provider?

 

In that case this would have been better posted in the HTC Sprint Hero forum. I'll move it there.

 

There is an audio loss issue with the Hero. Appaently it is happening to you. You can reboot your phone (shut it off and turn it back on) and that usually works to fix it. Since you upgraded with the official 2.1, though, I would take it to sprint and tell them that you want a new phone, for safety reasons. Who knows when it will happen, and if the audio goes out during an emergency, then what? Those of us who rooted have a fix for it, but if you aren't rooted, it won't work for you. Good luck, hope you can get it straightened out.

 

Dunno if you have resolved the issue or not yet just wanted to let you know that as of Thursday I had this same exact issue. Thursday night I updated to firmware 2.1 and the following morning I was no longer able to receive calls. Texts were also not working, i could call out and still access the internet. Frustrated all day I finally called Sprint Customer service and after about an hour of trying everything to fix it, we finally had to do a factory reset on the Hero. After that it hasn't had any issues since. So my suggestion is to simply call them up and have them walk you through a factory reset. Hope this helps, let me know how it turns out

 

sorry double post

 

Bluetooth Issue: After the update, I am experiencing frequent issues with BT in my car ( 2010 M35 ). It pairs OK with my car, but most times the call just doesn't connect - either incoming/or outgoing. I have tried deleting the phone and re-installing...but, no luck. Prior to the update, I had no issues with BT connectivity with my car's system, so this issue is definitely related to the upgrade.

 

Not sure if this is what you are talking about, but I have a serious lag on making calls. When I click the person's name it takes about 7-10 seconds before it will actually call, plus the connect time.

 

you can always do a hard reset using your PRI code....

call up sprint and ask them for the PRI code...or have them guide you..that should fix your problem...

 

Now, I guess we know why they update release took so long in the testing phase with Sprint!!! BUT, They still cant get it right!!
They should have put a warning on it.