Intallation website: www.payqi.com/app/install.html; PayQi is a multi SIM & dual standby adapter for iPhone 5 / 5s / 5c; Instruction: Install dial software, close Wi-Fi of your cellphone, open cellular mobile data; Open personal hotspot, clip the dialog box to connect bluetooth; search related device, match pin code: 888888; Then open dial software to see if there is green light, which means connected successfully; Built-in li-ion battery (700mA); Supports frequency: 850 / 900 / 1800 / 1900MHZ; Bluetooth version: V4.0 + EDR; Standby time: 70h; Talking time: 8h; Charging port: micro USB; Do not need to break jail; Supports voice talking, SMS and online surfing; Note: iPhone need to use SIM card w/ 3G to start personal hotspot to connect bluetooth.