Will an Xperia X10i work in Japan?

Question:

I'll be visiting Japan in 2 days. I would like to know if my Xperia X10i function in Japan.

Answer:

1. It depends if your mobile phone provider works in Japan or not, you might end up paying extremely high roaming rates unless you plan on renting a sim in Japan. I suggest you becareful on your data useage or be shocked at your monthly bill.

2. Just because something is 3G or even made by Sony does not mean it will automatically work on all Japanese networks

The frequencies it uses is important. Note that the Xperia X10a (a model) is sold in Japan not the Xperia X10i (i model). The a and i models use different networks, for example the a model can run on the 800 frequency (used by NTT Docomo) while the i model cannot.

In Japan the 800, 1500, 1700 and 2100 network bands are used by different companies, the i model does cover some of the networks, so generally you would be OK to use the i model in Japan on the other networks.

But again it depends if your overseas network allows it to be used in Japan (watch out for roaming data prices) or if you want to get a sim card in Japan to use.