Columbas DAB

Hi All

I did a 100 mile round trip in a nasty Citroen yesterday. The only good bit was the dab was flawless. I have sent the following to Skoda UK.

I am having on going problems with the Columbus DAB in my November 2014 Octavia L&K. It has been in to Skoda at Exeter for checking and has had its software upgraded to 0390.
 
I had a hire car yesterday and did a trip from Exeter to Bristol in a rather horrible Citroen C4. The one positive about the car was that the DAB did not loose signal for the entire trip.
 
By comparison my Octavia with a top of the range Columbus with Canton only gets coverage on half of the trip. At the moment I am using my mobile phone through the iPhone connection to get digital radio.
 
Looking on the Briskoda site, tis is a common problem. The latest update helped, but did not get close to solving the problem.
 
Could you tell me what the current plans are to resolve this issue? Does it need a signal booster or perhaps an external antenna? Alternatively can I upgrade to the new Columbus MIB2 if that solves the problem?
 
Thanks

XXX

Has anyone else managed to resolve this?

Thanks

Garnett