America models are on the same firmware. Custom firmware has features which developers and other people can use to gain more access. It's not custom in the sense that it has loads of cool features for us to use. I think the software is all the same but it alters itself when it knows it's a US or UK handset. Not sure on this yet.
As long as you haven't got RC30 (when you turn on the phone for the first time you are asked if you wish to upgrade) then you can use custom firmware because of the root hack. It is possible to downgrade or install the proper RC30 once you have installed custom firmware.
Not sure on risks or advantages yet. Still reading up.
Links I am reading:
http://forum.xda-developers.com/showthread.php?t=443713
http://forum.xda-developers.com/showthread.php?t=443041
http://forum.xda-developers.com/showthread.php?t=445544
http://forum.xda-developers.com/showthread.php?t=442480
Is this a worthy upgrade for an N95 8gb? I got offered this for £25 a month on T-Mobile at CPW, what gps software is compatible with this device?
Thanks.
EDIT: No custom firmware for me. My G1 hung as I hit enter. Only when to unfreeze a popup came up and it selected it. That popup was the update... crap
Somebody swapped me their unwanted G1 upgrade for my 6 month old N95 8GB and I can't believe my luck. You wont be disappointed!
For the best really, from what I can read. Having all commands entered as root can be pretty dangerous especially as many words may be interpretted, despite no intention (Eg, "cat"). I think it's certainly best to either update to the latest official or the latest custom. If I get my G1 I'm not sure what I'll do - I like the idea of custom but I do not think I'd actually make any use of the (current) benefits... Once the "custom" scene takes off in a bigger way (Eg, there is more reason to run custom) then I'm sure they'll be hacks to allow it on the latest (at that time) firmware... Very much like the PSP scene.
Is anyone on Combi 12month with 1gb? I don't think the phone will last over 12 months as it is pretty big and I always drop my phones.
I have just been reading about how poor the battery life is, does it charge of a standard mini usb cable?