Facebook iPhone chat problems?

So when I go onto the app Facebook on my iPhone it tells my friends that infact I'm online (the green dot) instead of on mobile. How do I fix this?

Is it possible to update my iphone?

I have an iphone that is carrier unlocked, not factory unlocked. My iphone is not jailbroken and has never been. Is it possible to update to the latest firmware without anything bad happening to the carrier unlock?

Are photos deleted off of an iPhone always recoverable?

The reason I'm asking is because the other day a friend of mine asked if I still had photos from a particular evening about a year ago. I deleted the photos several months ago. Is there any way to access them? I saw somewhere that deleted files eventually get overwritten and cease to exist.

Iphone app for repeating voice notes?

Hi. I recently heard that recording something and listining it all night long subconsciously helps you remember all of it. Well, i have an iphone and i was looking for an app that basically keeps repeating the voice note, like we do for a song (sorry, i forgot what that option is called). I mean it keeps on repeating it by itself again and again all night, only that particular note.
Please help me if you can. And explain how to do it too. I'm a little technologically challenged lol.
Thanks in advance.
Best Wishes.

Added (1). How to record it and add to itunes?

Added (2). How to record it and add to itunes?

How to unlock iPhone 4 from different computer?

I just bought an iPhone 4 from eBay that is showing the "iPhone disabled, connect to iTunes" message. One of my workmates reckons it won't restore if I plug it into my computer because that's not the one it's registered to. Does anyone know if this is true or not.

Sims freeplay version 4.0 money cheats?

Okay so i have tried what feels like very cheat possible and none seem to work! I have an iphone 3gs and the sims free play is version 4.0. I'm low on simoleons and i don't want to have to wait for my sims to finish planting or working. Does anyone have any cheats that they believe will finally work me?