Smartphones have become so ingrained in daily life that a study by Ericsson found that in the fourth quarter of 2015, they made up 75 percent of all mobile phones sold in the last three months of the year.
Sales have slowed from their heady heights in recent years, however, as economic uncertainties and troubles in emerging economies temper the demand for smartphones.
On Sunday, the South Korean consumer electronics manufacturer launched the newest editions of its flagship Galaxy phones - the S7 and curved screen S7 Edge - ahead of the Mobile World Congress in Barcelona, in a bid to revive sales momentum.
Chinese phone maker Huawei made a bold prediction this week - it plans to surpass Apple as the second-biggest smartphone player in three years and leapfrog Samsung by 2021.
The Chinese company shipped 108 million smartphones in 2015 compared to Apple's 231.5 million iPhones shipped and Samsung's 317.2 million phones for the same period.
Not only has Huawei made headway, Apple's also showing signs of stuttering. Last month, the Cupertino-based company missed iPhone sales expectations for the last quarter.
Another tech company making strides in the mobile space is social media giant Facebook. The network said it has 1.44 billion monthly active users who access the social network through their mobile phones. The company's mobile advertising revenue represented about 80 percent of all ad revenue in the fourth quarter of 2015.
So as smartphone makers and tech companies fight for dominance in a changing environment, tell us which of the following companies has the best mobile strategy.