Right now the 5310 XpressMusic shuts off the screen every 10-15 seconds.
Depending on the many different types of 3rd party applications you are running on the phone, using the different menu keys will result in negative effects, because every piece of software designed to run on the phone isn't always going to respond to the same key inputs when you push a particular key to turn the screen on.
I have been in many situations where I thought a particular key would be appropriate, to only realize I lost what I was doing, the application shut down, or something had to be started over. Simply put, you're not going to always be able to use the Menu key to turn the screen on, sometimes yes, and sometimes no. So for all the various types of software out there, you now have know the quirks of the software to know which key is best to have the dispaly come back on, which can be a real pain when you forget.
Also it was really bad judgment on the part of Nokia to have a screen shut off every 10 seconds, especially when the phone has many capabilites built into along the lines of multimedia, office productivity, internet activity, email, etc...
Who wants to be involved with something in regards to writing and reading as an example and then have to keep turning the screen on every 10 seconds to do what it is you're trying to do? Would you want to sit in front of your computer for hours doing something and in that period of time have your monitor shut off every 10 seconds? Of course not, so you should at least look at it like this, it's a real inconvenience, that also causes problems too if you're not careful the key you pressed.
Nokia needs to get a firmware update out for the 5310 so that users can simply keep their display on when they need it, and put it in the sleep mode when you need it to shut off.
I need my phone for business purposes not just pleasure, and I don't like having to keep punching the keypad to turn it on every ten seconds. The phone is a piece of technology meant to be used, not going to sleep all the time, and didn't Nokia realize, having the display constantly going on an off through out the day does put more wear and tear on it, then just leaving it on? Electronics are meant to be run and used, not going on and off, it's not good for it.
Someone in management really needs to look at this and hear what I'm saying because the people who did this aren't the people using this phone, because if they were, they'd of changed some firmware on it a long time ago realizing what a pain it is to use this phone.
I hope someone responsible for firmware within the company, or whoever knows people who handle this, can give some input back to this post, because I need to use a phone, not have it going to sleep on me all the time, and if Nokia isn't going to resolove this soon, I'm left with no other choice then to get another phone.
As a man that has a good background in technology and electronics, who happens to also work in the IT business, I don't know of any consumer that is going to be looking at devices and asking themself, making decisions based on whether or not the display stays on or goes off all the time. Consumers who understand technology don't look at it this way, they are looking at a device to use it, so they naturally assume it's just going to stay on, and it will go off when they decide it will go off, thus giving them the option to choose.
Nokia on their poor judgement made this call for consumers and it was a very poor choice, having a display always shut off evey 10-15 seconds with no options to keep it on is just unacceptable, for technology that needs to be used!
I truly can't believe a company like Nokia would of made such a poor choice.