2x Multiplier is a power-up in Subway Surfers. When picked up, the score multiplier is doubled, allowing the player to get double the amount of points in a specific period of time. For instance, if the score multiplier is X5, it will be X10 when the power-up is picked up. It is a yellow star with '2x' written on it.
Trivia
With this, plus the Score Booster and the Hot Rodboard or the Daredevilboard, and upgrades in some other boards, scores can increase at insanely high speeds.
The 2X Multiplier, the Score Booster, the Super Mysterizer, and the missions are the only mechanics in the game that can affect the score multiplier.
Strangely, the icon of the 2x multiplier is written as '2x', while the one to be collected on the tracks is written as 'x2'.
When collected, the multiplier turns green.
This and the Score Booster are the only power-ups not seen held by the player's character when used, which is probably because they can't be physically held it is also the only power-up that does not affect the player's gameplay.
You can have to have up to 30x. When you get a 30/30 multiplier, and you will unlock a new set of missions.
In it got a new look.
Gallery
A 2x multiplier
Multiplier when using the 2x Multiplier
The 2x Multiplier fully upgraded
A Multiplier activated along with 4 other Power-Ups