My iPhone 5 won't save my number in phone settings?

I just recently got my old number switched to my iPhone 5. I've texted several people with no problem off of it but it keeps popping up with the message "MMS requires your phone number" and telling me how to open my phone number in settings. I keep going to settings and putting my number in but it keeps telling me it can't save my number. These notifications are really getting on my nerves and I don't know what to do. Has anyone had this problem and knows how to fix it?

Added (1). I would if I could, Luigi.

Can't delete 'ghost' apps off iPhone?

I synced my phone to my iMac computer, and there's multiple devices synced to this computer, so there's over 600 apps. I didn't realize they would all be downloaded onto my iPhone, since this had never happened before, but they did. I tried manually deleting them, and it worked for a short while, but all the apps came back after I used my phone again. This time however, the apps looked the way they do while they're downloading (darker than usual), and I couldn't open any of them. I held down the 'ghost' apps, and when I pressed the 'x' sign, nothing happened. The apps are still there, and even when I try to delete other apps, they show up again. A while before I synced my phone and all this happened, I had a similar problem with apps I tried to delete. They would delete, but the icon of the app would stay there in the same way they are now.

This is getting very frustrating, as I have about 300 apps on my phone that I can't delete, and I don't have much space left. I would greatly appreciate any help.

How to clean an Otter Box for IPhone 5s?

It is a defender case it is off the phone but whenever i try to clean it and put it back on its dirty

If I download a movie on my iPhone an delete it, can I redownload it?

I have an iPhone 4S, and I downloaded The Dark Knight onto my phone. I delete it from my phone, will I still have it on my iTunes account and will I be able to redownload it? I just want to know if I can get it back without paying for it again.

If I put my Sim Card in another iPhone will?

My friend is offering me his new iPhone 5c for $70, if I buy it, can I take the SIM card out of my iPhone 4s and put it in the 5c to keep my number? I've already backed my phone up with icloud so I can restore the 5c and backup my contacts and apps. But the main question is: Will my iPhone 4 number stay on my 5c if I replace the sim card?

I have a choice of upgrading to the IPhone 5c or the 5s. Which is the wiser decision?

I'd be spending around $215 for a 16gb 5s. Or the same for a 32gb 5c. Unless I were to stick with the 16gb 5c. I'm upgrading because 8 gigabytes wasn't enough memory.

Where is the cheapest place to get an iphone 5s?

I have an I phone 4 and I don't get an upgrade until September. The lady at verizon said if I but a new phone online, or in the stores I can use that. In stores it is very expensive. Is there a website that sells them for preferably under $500?

What are symptoms that show that iphone battery is getting weaker?

And should be replaced?

Does it harm the iphone if I leave its light on?

When I read I don't like alot of light. Even the desk lamp is slightly too much. I tried the iphone lamp and I really like it.

I'm just wandering does it harm the phone if I leave it on?

Netflix won't load on my laptop?

I use netflix on my ipad and iphone and it works just fine on those but then when i go to use it on my computer it doesn't work. I'll click on the video i want to stream and then it just goes to a black screen where the movie should start playing. I'm not sure what's wrong but i really wanna watch on my laptop so if someone could please help that would be awesome!