Prx noise, there is no single fix for it, it can be related to intereference Dect 6 is a big problem in the uk. But essentially it points to incorrect build/faulty kit, power pays a big part as does call volume. I’m currently working on the noise issue now on our project all site issue’s are post the T-Mo and 3Uk consolidation, Flexi mainly but some ultra site’s also. Generally if the noise sit’s around 111+ then it could be a build issue, check and confirm MHA type poer settings etc also check ucu settings