Some news about FP4 in the last UBports Q&A 
Fairphone
Fairose asked about the current state of FP4 with pre-installed UT. Is there an expected date for sales to start? Actually we may skip a model and go for launch with FP5. One of the things we are particularly keen on is to have 5G support. Marius has got that working in beta. It should be in Devel by the time of the next Q&A.
In the EU we can get by without VoLTE but in many countries it is essential and we would want FP5 to have that at launch.