I've a OnePlus 3 which has dual sim functionality. Of course I've also a single common smartphone sim which provides me with a telephone number and internet access.
Since there are pretty cheap data-only sim cards (they are commonly used for laptops, tablets etc.) I wondered if my smartphone is able to handle such. It would increase my speed, coverage and data volume for just little money. Also I don't have to deal with two telephone numbers.
Does this actually work? Is it a good idea?