Why won't my 3 sim work in my Sony Ericsson mobile?

Right now I have an 02 pay as you go sim in my unlocked Sony Ericsson phone it works fine. I've put in my 3 contract sim in and it comes up on the screen "invalid sim". I'm using a very old phone as mine was stolen.

From looking at the sims, 02s has a large chip and 3s is quite small so maybe the phone can't read it? If that's the reason can I request a larger chip from 3? This is second sim I've requested from them after they stupidly sent me an iPhone one.

How to use simple mobile on iphone 5?

So i'm ordering a iphone 5 in a few weeks. And i want to use the simple mobile service. But i want to make sure that its possible first. And if so, how do i do it? Because i remember when i tryed to get that service for my iphone 4, they said i needed a gevey sim, and when i got it, it still didn't work.

2 twitter accounts, will anyone knows?

I'm using iPhone and I have 2 twitter accounts, will people in my first accountl know about the second? I mean twitter won't post something like " your friend is singed into 2 accounts go and follow! " right? I know it's silly but I wanna know, thanks

White iPhone 5 sides turning yellow

Just got my iPhone 5 from my plan network yesterday, and I opted for the color white since I've heard the black one is prone to more visible scratches.

After getting the 5, I immediately bought a silicon case for it, so I haven't really had the time to actually "look" at it…

But this evening when I took the phone out of the case to do my OCD check up and clean up, I find the sides of the iPhone are turning into this hideous yellow color and I tried wiping it off, it wouldn't come off. Also the aluminum sides are starting to peel off, revealing a lighter silverish yellow color.

And the worst part is, I can't swap it with another iPhone, since what I get on the first day of plan, I will be sticking with it till the contract's over. It's really bugging me

Added (1). P.S. I live in a little city in the Philippines, so NO, we don't have an Apple Store here, so that's out of the question.

Is there anyway to make calls louder on iphone 5?

I recently got an iPhone 5 but my whenever I call someone or they call me, their voice seems really distant and quite in general, I tried turning the sound up via the volume buttons but it's still the same? Is there anything I can do about this?

My lock button is broken, what do I do?

I have the iPhone 4s which I got about 6-7 months ago. I haven't dropped it or had water damage or anything because I always take good care of my phones but all of the sudden my lock button got stuck, and isn't working. I have put on the assestivetouch option, but I still find it annoying because I'm so used to just pressing the lock button all the time. I know I could take it in to get a new phone but would I lose all of my data, like photos and such? I know that they can transfer contacts, but I wouldn't like to lose my pictures. Also I'm not sure how much warranty I have on it because when I got my phone, I wasn't really paying any attention because it's my Mom who pays attention to that. I guess I could just go in anyway… I wish I could get an iPhone 5 though because they are awesome but it isn't really necessary, I just want it. Anyway, I kind of answered my own question but if you have any suggestions please let me know, thanks. Oh! And should I go into the AT&T store or the Apple Store?

How to get paid apps for free in iphone?

My iphone is jailbroken n i had installous in it, but i was getting AIP not found error in installous so i tried to uninstall it and install it back again… But now when i try to install it from cydia from hackulous source, cydia crashes n i can't get installous back… Is there any other way to get it back or any other option like installous where i can get all paid apps for free… Ll really appreciate your help n thanks for replying.

Would restoring my iphone to another iphones settings change the imei?

Basically i bought a phone from cex about 2 weeks ago and one of the buttons has stopped working. I went into the store and they said they could not fix it because the imei's were not the same.
Could i have changed it by restoring it to my old iphone's setting via the restore feature on itunes?