Hi there, I bought a Japanese version of the XPERIA V - the XPERIA AX and I had no problems at all using my phone all over Asia and in Europe. However, things changed when I came to the US and found out that my phone can't pick up any signal over here. I went into phone information by entering *#*#4636#*#* and tried changing the Network mode from LTE to WCDMA, Global, GSM etc. but the phone won't find any service providers... It won't allow me to change the radio band either.. Could anyone help me out? Any help would be appreciated... Thanks!