Here is a simple trick to do in subway surfers to get unlimited gold coins,instructions are given below,follow it
For Rooted Phones:
Download my TITANIUM BACKUP file and restore data only using titanium backup
TITANIUM BACKUP FILE DOWNLOAD
For Non Rooted phones.
Download zip file from below and extract in SDCard/Android/data/ and done.
DOWNLOAD SAVE ZIP FILE
If you want to download this game then here is the link
GET SUBWAY SURFER