As it turns out it is rather popular. According to a report from OpenSignal (via GSM Arena), it seems that 25% of all Android devices out there have the dual SIM capability. This is based on the 1 million or so users who have OpenSignal’s Android app. The report also goes to show that such a feature is especially popular in Nigeria, followed by Bangladesh, Tanzania, and Guatemala just to name a few.
Interestingly enough it seems that over in Norway, dual SIM devices are practically non-existent with not even 1% of the market. In terms of which dual SIM devices are the most popular, Samsung snags the top three spots with the Galaxy Core, Galaxy Win Duos, and Galaxy S Duos. Nokia also made it into the list with the Nokia XL.
For those unfamiliar with dual SIMs, it is basically where the phone will allow the user to have more than one SIM card active at a time. They can receive messages from either SIM card and can choose to call out using whichever SIM card they prefer. It makes it ideal for users who have more than one line but don’t want to carry more than one handset.