Can I update my factory unlocked Iphone 4s?

I have an Iphone 4s that was originally bought in Japan and it's factory unlocked. My mom told me that the phone was not recognize anymore on the company where it was bought and that i could update it without losing the factory unlock but I'm still having doubts so could I really update it?

Why can I not see all of my favorites on my Twitter app?

I have an iPhone 6 and when I go to look at my or other people s favorites, it will not show or load them all. It shows I have over 100 favorites but will only show me some of my most recent. When I log on to twitter.com on my desktop, it will load them all though. Is there a way I can load them all? I scroll down multiple times and it loads about 40, but then it stops and shows the little bird logo at the bottom, to show that it will not go any further.

Does resetting an iPhone 4s unlock it from a certain carrier?

I bought an iPhone 4s and its Locked to orange. I'm with tesco mobile. If I reset the phone, would I be able to use my sim and unlock the phone from Orange? The person who we bought it off is on holiday and I need my phone to work As soon as possible, and they can't cancel the unlocking thing from where they are.

What's wrong with me? Serious Spending issues?

I'm a 23 year old male and I have a serious problem with spending large amounts of money, returning things, and exchanging things. In the last month I have spent over $1800 on phones. If I buy a phone, usually in a couple of days I will have a strong urge to exchange it for a different phone. My carrier only allows for 1 exchange after 15 days of purchase. Back in May I bought a LG android on a new contract… Well that same day I changed my mind and exchanged it for the iPhone 6 and paid the difference. Then about 5 days later I decided I wanted the iPhone 6 again. My carrier went ahead and did the 2nd exchange for me even though it wasn't allowed. I kept the LG android for about 3 weeks. I decided I wanted the new Galaxy S6 and I bought it at the full price of $700. About 14 days after having the Galaxy S6, I had an impulse at last minute to go back to the iPhone 6. Sure enough, I exchanged the Galaxy for the iPhone 6. Well a coulple days later I got a strong urge to have the Galaxy S6 Edge. So my carrier Said I couldn t exchange but they could give me trade in credit for the iPhone. They gave me $400 for the iPhone to use toward the S6 edge. The s6 edge was 800 bucks but I only had to pay about $420 due to my trade in credit. I kept the S6 edge for about 5 days. I decided, yet again, that I wanted the iPhone 6. I wasn't allow

What is the name of this camera filter?

Does anyone know what the name of this filter is? I know I probably sound dumb asking but I just really want to know what this is called (referring to the picture below). For example, you can have a "black and white" filter on a picture, or "over exposure" or "vignette". And also do you know what iPhone app I can get that has this filter? Thank you so much!

Added (1). Well, I honestly don't really care if there isn't an app out there that has this. But I just want to know what this type of photo manipulation this is called? It may not be a filter but I don't know what else to call this type of photo edit. What is the name of this camera filter - 1