Im just curious as to why so many of these new phones aren't coming out aren't coming with the newest technology available right out of the box. Gingerbread, 4g lte (Verizon customer here) etc. Yes I know I can always root my phone but I don't think I should have to. I for one will not buy a new phone unless it has the latest OS version. I mean c'mon the thunderbolt comes compatible with 4g lte but it operates on froyo. Just makes no sense to me. Especially with the way official software updates are pushed out these days. Still waiting on GB for my d2. I mean really how many people would buy a new pc that doesnt come with the latest software pre-installed? Anyway here's hoping that the d3 comes with 4g compatibility, GB (or whatever the current OS version is at the time), front facing camera, dual/quad core processor amongst other things. If not I guess I will keep my d2 and root it.
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Seems like more of a general android discussion the droid 2 discussion, none the less, the short answer is research and development. It takes time for the manufactures to get there custom ui integrated in to android and update the drivers and such for new hardware. You have to think these phones start getting made 6 months to a year before they hit the market. If an Android update hits during that time they have already started development for 2.2, for example, 2.3 would require them starting over to an extent. It is more efficient to keep going with 2.2 and plan to update to 2.3 later which would not be to hard as then they are porting the code already written rather then written from scratch.
Another factor is cost, 4G radios are newer tech and therefore more expensive to the manufacturer. This cost gets passed on to the customer and of course it required some R&D on the manufacturer side to. Same goes not only for 4G radios, but 8 megapixel cameras as well. As the technology becomes more common it becomes cheaper and therefore more common.