I just returned form a Nokia service center and had a free upgrade to the latest firmware. I suggest you try the same, rather than experimenting with cracked (and illegal) versions of Phoenix - or even doing it yourself via NSU.
My Nokia technician tells me that their method is far safer than NSU - they attach a connector to the phone in the battery compartment - and use a dedicated PC which minimizes the risk that something goes wrong, bricking the phone.
Youtube videos work - if you have enough bandwidth. My first attempt was extremely disappointing, with video stopping, stuttering or not loading at all - even though I had almost max signal. Moving to a different position solved the problem. Video quality appears to be somwhat less than Emtube, but it is a great relief to be able to watch an embedded video. I am looking forward to a similar release for my E90 which I find far more useful for browsing.
Maps is version 1.2 wk4801. I did get a GPS fix in a few seconds from a position about 1m from the window in my appartment. The view of the sky is limited, as the window is facing a courtyard with buildings on all sides - and I am right in one corner. Quite OK i think.
Gallery performance is much better, at least when scrolling around the list of pictures. Opening the gallery still takes a few seconds the first time.
Otherwise, it looks like the previous version
Regards
Michael