We do not recommend using the Particle mobile apps for setup. For product devices, the best method is to add the Device ID or serial number to your product, which will add the device and activate the SIM card.
When ordering in tray quantities from the Particle wholesale store, you’ll get an email with the Device IDs, and you can add them all at once. In the growth and enterprise plans, the device is not billable until it comes online the first time.