All, I know I'm not the only one who has a Thunderbolt with mediocre call quality. This is per a response from HTC customer support. It's not terrible but is by no means great! So please complain to HTC!!!
HTC Mobile Phones - Customer Service - E-mail Support
Jeff, as yet this has not been seen as a trend with HTC. every call and email is flagged by the model ofthe device and the issue. This information is then gathered by HTC to see if any trends are occurring. My suggestion is to turn the device off, remove the battery for 20 seconds, replace and turn back on. If this does not resolve the issue, you will need to perform a factory reset.
Factory reset is not a step to be taken lightly. It’ll permanently delete all your data and
customized settings, and will remove any applications you’ve downloaded and installed. Be sure to
back up any data and files you want to keep before you do a factory reset using HTC Sync.
HTC Mobile Phones - Customer Service - E-mail Support
Jeff, as yet this has not been seen as a trend with HTC. every call and email is flagged by the model ofthe device and the issue. This information is then gathered by HTC to see if any trends are occurring. My suggestion is to turn the device off, remove the battery for 20 seconds, replace and turn back on. If this does not resolve the issue, you will need to perform a factory reset.
Factory reset is not a step to be taken lightly. It’ll permanently delete all your data and
customized settings, and will remove any applications you’ve downloaded and installed. Be sure to
back up any data and files you want to keep before you do a factory reset using HTC Sync.