HTC Desire was/is a very good phone but is starting to look a little slow.
Also the internal memory is limiting, I routed mine to direct all the downloaded apps to the SD card which had a special partition on it to do so.
I did consider the HTC Sensation Beats DR Dre AAAAAAAAAAIIIIIIIIIIIIIIIIIIIIII!
But I preferred the Samsung.
That has a dual core 1.5ghz processor though so if its speed your after?
Rumour has it, the Galaxy S3 will be a quad core 2.0ghz processor! Which, if true, is truly mental!
Really the only reason I changed was the monthly tariff and newer phone but I love the S2.
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June next year for s3.