sorry, i didnt know the extent of your knowledge, i wasnt trying to bamboozle you. plenty of people ‘root’ their android phones these days which means you wipe it, and instal a different ‘operating system’, created by developers.
can be pretty techy to get your head round, but we all start somewhere. if you want a read up, to see if its of any interest, heres the link to rooting a desire HD. your phone will have its own page on that site, and theres loads of help on there.
once you got your new ‘rom’ (operating system), you can play around with it, from battery percentage icons, to setting your ‘governor’ which dictates how your battery will be used when its awake / asleep etc. mines been totally transformed and ive got better battery life than ever on a relatively ‘old’ phone.
if you find its not for you, as long as youve done a back up, you revert back to exactly how it was. and try the next one!! 😀
heres a pic of how ive got my homescreen, on yes, the ice COLD sandwich rom 🙂