Dual-sim is awesome. Is there a way to have 1 SIM be soley used for data? The reason is that here you can buy a SIM package that's only data for a lot cheaper

Dual-sim is awesome. Is there a way to have 1 SIM be soley used for data? The reason is that here you can buy a SIM package that's only data for a lot cheaper than a voice/data combined SIM. It would be awesome for me to buy pre-paid voice for when I call people (very seldom) and use the data SIM for anything data (which I use 99% of the time). Would save me a lot of money on cellphone fees.