Totally cannot connect.is it intermittent or totally unusable?
If intermittent, it’s network issue. Try reset network setting, APN, manual connect, auto connect etc and it might resolve your issue somehow.
If totally cannot use, it could be becos you did not turn on long enough in sg and they didn’t register your number for roaming. (Advise to turn on 72hrs before you go overseas)
If u are those that travel many countries in a week, too bad, Simba will tell you their plan is not meant for your Usage
Now in China. I do 3-4 weeks in China. Then up to one week in Singapore. Then 2 weeks Malaysia. Then back to China.
It has been working for months. Was in Australia, Malaysia and China now.
This afternoon it stopped working.