Make sure your SIM card have 2G network.
This is a Bluetooth cases, connecting to your mobile phone with dedicated App, it enables single SIM card mobile phone to be Dual SIM, for a phone call and SMS operations. It surpport a phone call and SMS operations.
Network data service does not support.
1. Make iPhone 7 dual SIM dual standby, 2 SIMs working at the same time;
2. Extra battery for iPhone 7;
3. Protect cases for iPhone 7;
4.Only need charge the adapter cases, then you can charge your iPhone 7 at the same time.
SIM type: Micro SIM;
Network standard: GSM;
Support iOS: iOS 7.1+;
Jailbreak: No need jailbreak;
Language: Support multi language.