What bluetooth upgrade is suitable for a better connection with iPhone 11 ? For Columbus unit on Skoda Octavia 2 facelift 1.4 TSI Now I have this one, and there are some delays on phone calls. I'm fairly sure the rns315 you had to spec if you wanted Bluetooth, it may not of had the option fitted from the factory. The Bluetooth module in Octavia's is under one of the front seats so you can check to see if one is installed. 6OiDMA.