You need to install B4i-Bridge once. It is done from the device browser.
If you are using a local builder then you need to install the B4I certificate:
Open Safari (device browser) and navigate to:
www.b4x.com/ca.pem
iOS 10+: Go to Settings - General - About - Certificate Trust Settings and enable the
B4I certificate. The certificate is required for the over the air installation.