@David-TP 

M8550 can combine with certain bands up to 5 bands in Download (DL) using Carrier Aggregation as far as I understand it by the file provided. See attached filtered for 5DL: 

 

Thats surprisingly good if correct. I was expecting lower CA results given the device "only" supports 3GPP Release 16. Honestly I would have expected 3GPP Release 17 or 18 as given with such CA results. Maybe the information about 3GPP 16 is wrong? Anyways on the CA side it is good news :-) 

Please note, I´m not a technician. Maybe I´m also wrong with my statements.  Thanks to confirm therefore.

  @LutzB I cannot even get mine to connect.  It just keeps cycling through the connecting phase after eliminting the string errors after downloading the file from my Draytek.  

On this basis, I'm sending mine back with the marketing hype on this "tri band" (but not simultanesly operation), I may as well get something a bit more reputable for the money.  I managed to get a re-badged AMIT with firmware fixes to at least dial in to a server and work two ways, this is looking very much like that situation where they fix one thing and introduce half a dozen problems, albeit breaking what was once fixed.  Shame becuase the unit itself looks nice.   

  @David-TP 

Thank you for coming back to me.  

If I could get this working, I'd be willing to keep the product.  I'll check my messages and test the firmware.  

Grateful

Pete

  @David-TP 

Hi David

Many thanks for coming back to me, I will try this out.  I believe Evan (in the other post) is still struggling to establish a tunnel.  

Tried to reply to your message, but it wouldn't let me due to a lack of following.  

Regards

Pete