To do this, you only need to update the field called ' Mobile Data APN' - please leave all other fields as they are:
Open Settings
Tap Mobile Service / Mobile Data / Cellular (The name varies depending on what version of iOS you have)
Select your Smart SIM
Tap Mobile Data Network / Cellular Data Network
Replace just the top APN (Mobile Data / Cellular Data) with data00.telnyx
Tap the back arrow to save.
Once done, it is recommended to restart your phone to reset your connection.
