Oh guys, I really appreciate your help! Didn't think it was that fast. =P
So @wizard_hu_ I'll check on that, but as you said, and it's true indeed, probably they won't accept as a formal feedback for future updates as these are old phones =/
But I'll give it a shot anyways. After I created this post here I headed over there to ask the same thing.
And @symbianyucca, there are a few minor options which the current Firmware doesn't support.
Here are they:
(Obs.: These are personal notes, that's why they're referring as "you" in subject. But consider as someone else.)
1 - Can't you place an option on the Lights Settings to dim the phone screen? I'd like to set the screen darker because it hurts my eyes with that brightful screen.
2 - Can't set Wireless as the default, and only, connection method. I don't want to use the data packets as they charge me a fee to use EDGE/GPRS/3G signal (Or either option to enable/disable it completely).
2.1 - On the Packet Data Settings, please set an option to disable completely. WhatsApp keeps reconnecting itself because of this option. (There are currently "When needed" and "Always online" only)
3 - Enable Multitasking*. - For Elmo's sake, I can't understand how come S40 smartphones doesn't have such feature!!! Please release this feature in the next updates! I've been really waiting for this for a long time.
* I know there are tutorials enabling to force the phone multitasking, but they may void the warranty of the phones. So I'd like to see an official release update.
As these are Firmware specific questions, probably the only solution would be to release an update enabling these options. Maybe 3rd Party apps would get it done, but they may harm the current Firmware installed, as it's a phone Flashing mod. =/
But, once again, I really appreciate your help =)