diff --git a/examples/platform/efr32/board_config.h b/examples/platform/efr32/board_config.h
index 7d374cc62df6ad..8c495b4fa7f513 100644
--- a/examples/platform/efr32/board_config.h
+++ b/examples/platform/efr32/board_config.h
@@ -36,13 +36,7 @@
 
 /// Dev board suppports OQPSK modulation in 2.4GHz band.
 #define RADIO_CONFIG_2P4GHZ_OQPSK_SUPPORT 1
-
-/// Dev board doesn't support OQPSK modulation in 915MHz band.
-#if (BRD4170A)
-#define RADIO_CONFIG_915MHZ_OQPSK_SUPPORT 1
-#else
 #define RADIO_CONFIG_915MHZ_OQPSK_SUPPORT 0
-#endif
 
 /// The PA(s) is(are) fed from the DCDC
 #if (BRD4166A)
diff --git a/third_party/openthread/ot-efr32 b/third_party/openthread/ot-efr32
index 68817f30052d32..19e9f80977f13d 160000
--- a/third_party/openthread/ot-efr32
+++ b/third_party/openthread/ot-efr32
@@ -1 +1 @@
-Subproject commit 68817f30052d322917b4bcaff231da4a2dee5403
+Subproject commit 19e9f80977f13dba5b0177fb487691e94dbbae7b