HTC has announced that the Android 2.1 roll-out for the GSM HTC Hero will start tomorrow, June 4^th. Owners of the HTC Hero have been waiting quite a long time for their Android 2.1 update. Customers in the U.S. who own the CDMA variants of the Hero have been enjoying Android 2.1 for a few weeks already. The announcement comes to us via HTC’s Taiwanese/Chinese Plurk account.

On June 4, 2010 to open up the wireless software update, the main update function as follows: Android 2.1 operating system upgrade!

System will continue to send updates prompt, when you receive a system prompt as long as you can by clicking Download or wireless network connection 3G/GPRS way to complete your phone system updates. Note: We recommend you to choose to have free Wi-Fi environment, download the update. If you are currently using 3G network, the download may have to pay the additional cost carriers, please make sure to have unlimited Internet access rates apply for rentals before use.

We appologize for the poor translation, the that’s the best Google could give us. Simply put, HTC will start rolling out Android 2.1 via an OTA. They recommend you download the update over Wi-Fi just to make sure you do not incur any additional 3G data charges. We would like to stress that this update is coming from HTC Taiwan, so there is no guarantee that the Android 2.1 update will be coming to HTC Hero owners in European markets. We’ll be sure to keep you updated tomorrow and let you know if the update actually starts pinging handsets across the globe.

Source: udn.com, thanks to @meLIanTheQuee for the tip.