I have connected to a mobile network "Rogers Wireless" in Canada, but I am unable to use 3G/4G. I have purchased the $50 prepaid happy roaming in Singapore. At first, there was a large deduction in my balance (which Starhub had already refunded me). After that, my 3G/4G could not work.
I have tried switching on and off my roaming service, but still does not work.
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