FCC certification - permissible changes internal antenna

I’m using RAK3172 with an internal PCB antenna, but according to FCC rules, I have to perform a certification using a test of permissible changes Class II to use this internal antenna. Does anyone know an approximate cost of performing such tests?
In addition, for CE certification is necessary to perform the same tests (permissible changes) but in the 869 MHZ band?
Thanks for any information about this.

Welcome back @jdsan ,

I recommend you get advice on your local certification lab. They can give more insightful information since they will assess your product with RAK3172.

I already sent this inquiry to our certification engineer. However, even though we sometimes give advise on this matter, it is still up to the certification lab’s assessment on the product. So it is best to coordinate with them.

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