IRONLINK RK06 Sweatproof Smart Watch Phone for iPhone 5s/6/6s and 4.2 Android or Above SmartPhones Include 8G Micro SD Card (Silver)

The product is easy to setup, but unable to use it for a full day to be able to give a complete review because I were unable to charge the watch with the USB cable supplied. May have to return it

Never was able to get connected to my iPhone. The instructions were so small I could barely read with a magnifying glass.

Can I use this to Text off of with out downloading the by notifier app? For example can I use my iPhone 6s version 10.1.1 with this watch to text off of if I put in a SIM card inthe watch?