Step 0: Create a Nano Nem Wallet or download Mobile Nem Wallet on your phone
Step 1: Create an invoice in Nano wallet or Mobile Nem Wallet
Step 2: Share via QR code as an invoice
Step 3: Person paying can scan your QR code and just click send
The QR code contains all the information.
Amount of XEM
Your address where XEM will arrive from your customer
and you can also add a message that gets coded in the QR code. SO cool.
Give it a try. This is so SO easy and simple. Feel free to ask any questions if you have any problems setting this up.