diff -ru brcmfmac_sdio-firmware-rpi.orig/firmware/brcm/brcmfmac43455-sdio.txt brcmfmac_sdio-firmware-rpi/firmware/brcm/brcmfmac43455-sdio.txt
--- brcmfmac_sdio-firmware-rpi.orig/firmware/brcm/brcmfmac43455-sdio.txt	2019-01-28 20:44:58.000000000 +0100
+++ brcmfmac_sdio-firmware-rpi/firmware/brcm/brcmfmac43455-sdio.txt	2019-06-11 13:09:30.388579306 +0200
@@ -21,7 +21,7 @@
 #            bit1 for btcoex
 boardflags=0x00480201
 boardflags2=0x40800000
-boardflags3=0x48200100
+boardflags3=0x44200100
 phycal_tempdelta=15
 rxchain=1
 txchain=1
@@ -91,7 +91,7 @@
 cbfilttype=1
 fdsslevel_ch11=6
 
-# Experimental Bluetooth coexistence parameters from Cypress
+# Improved Bluetooth coexistence parameters from Cypress
 btc_mode=1
 btc_params8=0x4e20
 btc_params1=0x7530
