Originally Posted by
tide
Thanks. I’m having issues with AT&T roaming on docomo. Multiple times during the day, I lose connection for sometimes hours. My iPad (T-Mo) is auto connecting to SoftBank LTE and refuses to roam. I don’t recall having such issues before but my last trip was Jan 2020.
IIJMIO (family members) is working fine. so is AIS Sim2Fly
How old are the devices?
Not all my devices support all the Japan LTE bands, but most of them should have 1/3/5/8 (typical Asian/European bands).
My TMobile (roaming on softbank) was usually on band 1 , sometimes 41. Other devices can't see band.
if it's connected but no data, likely some type of APN issue. But it's TMobile, so you shouldn't need to change apn