i owned a evo 3d and a optimus 3d. both were crap. needed restarts, crashes sometimes, what elektro said also true; they came with crapware, only deletable when rooted.
I couldnt get rid of burnedin browser bookmarks unless i rooted and then still it was a pain.
Browser was not smooth. Camera's were crappy as well, although some androids does have good cameras. Also the processor and ram power, i couldnt see **** of that. the menu's in both phones(although evo3d worse) were on the laggy side even with custom roms and my old 3gs would beat that with alot less power.
The evo3d and optimus3d had both camera's "sticking out of them" wich made them scratch easily. the evo3d shipped with dust between the camera lens and glass or something. in every photo there was a kind of mark.
I had problems removing the microsd card from the evo3d.
Alot of apps had compability problems. Gameloft games always wanted to install to the build in memory, not to the sd card. there was a hack to make this install to microsd but was a pain and didnt work on all. In google maps i was getting stopid messages about turning on wifi. i can hit the box to "not display this message again" but it doesnt listen to me. Both phones had terrible battery life versus my iphone 4 i had back then.
both devices had crappy volume buttons.
terrible audio quality, both on speakers and earphones.
Bulky, but i guess thats also because the 3d.
the optimus 3d had a crappy backlight led. it wouldnt stay on even when using a app.
and when i turned it on, the whole phone became ultra laggy. like the backlight also used 9/10th of CPU. the evo3d did fairly well with this.
I see everywhere parts that are copied over from iphone. in optimus 3d it was really like a clone lol.
Also a funny fact is that a family member once showed me a new video she made. I clicked the play button and android crashed. Thats the first time i held her phone to just watch the video. It got into the menu after waiting, but she couldnt start any app anymore. a restart fixed it though.
All the problems are above are mixed. they come from both devices together. so maybe if you have a evo3d i said a problem occuring on the optimus 3d.
honest good parts about android:
immediately and highly customisable, and failry quick jailbreakable usally.
Flash.
the 3d phones's 3d function were both quite cool on both devices. id say they both are as good as each other. the optimus 3d has clearer and more depth 3d, although the higher resolution on the evo3d made the 3d really blink out. on the optimus 3d it was like all lined out photos. you can see the lines ect.
Good key imput, although iphone is still better.
Honestly about iphone:
it doesnt got a proper bluetooth functionaily. headsets with stereo connect to the iphone as a "talk" device, wich means the sound doesnt get full glory. There's a workaround for this, but when you apply this workaround and you get a call your iphone will use the microphone in the iphone itself, until you select the bluetooth device in your phone screen. cant predefine and make it remember that because we're using a workaround.
the iphone is not customisable...but i find that a weak argument since im always jailbreaking it when its possible, wich unlocks the customising power.
And itunes is a big downside. itunes is crap. Although iOS5 made it much better to use the iphone with itunes.
But thats honestly all i can think of downsides.
It just works 100%. without trouble, errors, pain or flaws.(exept the bluetooth, fix it apple!) (and restoring is hard but thats only when youre a jailbreaker like me)
Ah finally got my apple vs android story out lol! im not a i-fanboy for no reason