Edison Group, the makers of Symphony, has teamed up with Grameenphone to launch 4G supported premium handset Helio S1. Customers can pre-book Helio S1 from Symphony Smart Plug-In, Symphony Exclusive Priority Outlets and Grameenphone centers from 18th August to 25th August, 2015. Each of the first 1,000 pre-bookers will get a flashlight enabled selfie-stick for free and free data offer from Grameenphone. A customer has to pay Tk. 3,000/- in advance to pre-book the upcoming Helio S1 from any one of the above mentioned Symphony or GP outlets. At the end of pre-booking period customers have to pay the rest of the money, Tk. 14,990/-, at the same outlet to get the handset and free selfie stick.