I can't log into my twitter app on my iPhone?

I've tried it on my iPhone. And on my laptop… I have two twitter accounts. And I looked up the one that I can't log into from my other account and like there's no picture and it shows that I'm not following or anyone is following me… It's pissing me off. I don't know what happen to that profile. Can you help me? I have the correct PW and user name, I've even tried logging in with my email an still nothing. I've uninstall the app and reinstall it an still nothing.restore my phone and everything and it still doesn't work… I cleared my browser and what knot… Like I said when I look up the account it shows no picture or follower or people I'm following. I think something happen to the account but I don't know… But can someone help me

I can't log into my twitter account no matter what?

I've tried it on my iPhone. And on my laptop… I have two twitter accounts. And I looked up the one that I can't log into from my other account and like there's no picture and it shows that I'm not following or anyone is following me… It's pissing me off. I don't know what happen to that profile. Can you help me? Thanks in advance… I have the correct PW and user name, I've even tried logging in with my email an stil nothing

Using iPhone internationally?

If I travel to a country In Asia for a few days. Can I use my iPhone 5? I have att and its not unlocked. I want to know what my options are. Can I put a sim from some carrier in that country or would I have to buy an international plan? Or is there something else I can do?

Better to get an unlocked iPhone 4s or iPhone 5?

Considering that an iPhone 4s costs about $450 for me to get right now or I can wait until they release an unlocked iPhone 5 and pay $650, which one would be better to purchase? (the wait time does not really bother me)

What can you do on an iPhone 5 that can't be done on an iPhone 4s? What are the important differences between the two?