Cellphone, need help deciding, please...

I am considering purchasing a new cell phone since my other one basically gave out on me, and I was looking for something more suitable anyway, but I am kind of stuck on which one to get. My main problem is I don't have a large spending budget to work with so I am limited to finding a phone for $150(USD) and under. Two of the phones I am considering are;

Moto Q(TM) Global
http://www.wireless.att.com/cell-phone-service/cell-phone-de...

or

Samsung Blackjack II
http://www.wireless.att.com/cell-phone-service/cell-phone-de...


I am unsure of which would be a better choice. My first concern is if the phone will work when I travel to Japan since I don't want to get something I can't use while traveling. And, my second concern is that I visit a few websites that are written in Japanese, will I still be able to view these websites on one of these phones? Does anyone have any experiences with either phone and recommend one over the other? Or, have any other recomendations?

My first concern is if the phone will work when I travel to Japan

Ask ATT, though I'm afraid it may not because their spec says "domestic UMTS."

that I visit a few websites that are written in Japanese, will I still be able to view these websites on one of these phones

Probably no, but it's best to try by yourself at shops.