After Returning To Japan - Sony Xperia A4 Instruction Manual

After returning to Japan

When you return to Japan, the terminal is
connected to DOCOMO network
automatically. If connection is failed, perform
the following operations.
Set "Preferred network type" to "LTE
･
(preferred)/3G/GSM" (P.190).
Set "Search mode" to "Automatic" in "Service
･
providers" (P.190).
International roaming
195