Slow bluetooth connection on ConnectionBuilder.Build

Hi, I am using Xamarin to create mobile app to print something on a Zebra Mobile Printer ZQ320. In my source code, I did use "ConnectionBuilder.Current.Build ("MAC Address")" to establish the connection among my mobile and the printer. However, I noticed that the single line of code took almost 10 seconds to be completed. Is that a normal time taken to connect the printer? Is there any method to make it faster? Thank you.

What options do we have for supporting TC70x series within a Xamarin Forms Cross-platform app targeting both Android AND iOS?

We're looking into supporting scanning devices made by Zebra, to scan barcodes. Most of our users are using TC70 Android device. But I have seen Windows device as well, and thought maybe one day someone might use an iOS device and plug in the zebra scanner to it somehow? Is it totally nonsense to try and support iOS at all? Or is there an actual option for this?

ANY help on this would be awesome!

DEVTALK - The New Xamarin SDK and Adding Printer Security Wednesday, Jan. 16th @10:00 am CDT

The Link-OS team has made a number of updates to the .NET SDK.  It now supports Xamarin, .NET Core, and .NET Framework.  This webinar will review how to use this updated library to code once and adds printing functionality to multiple frameworks.  We'll walk through some of the new capabilities for this library with Xamarin.