Sweden has a long line of mobile operators and not least virtual operators, which lack their own network and instead buy capacity from others. The virtual equivalents usually have lower prices.
Now we are simply wondering which mobile operator you are a customer of today? Will the virtual operators dominate on Swedroid and is there any operator that has significantly more customers than others?
If you have several different mobile subscriptions, choose the phone you use the most. The answer can be justified with a comment – did you choose that particular operator because it seemed the best and cheapest, or are you mostly a customer by chance or old habit?