I had the impression that Android 2.1 is reserved only for high-end and mid-end smartphones, but it looks like this is not true.

HTC Tattoo (the company’s most affordable Android handset to date) will apparently be upgraded to Android 2.1 soon.
According to FrAndroid, HTC has confirmed that they’re working to integrate its Sense UI with Android 2.1 on the Tattoo. This will “take time”, but the upgrade will come eventually.
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