diff --git a/apps/grgsm_trx b/apps/grgsm_trx
index 5174b5c..228be5d 100755
--- a/apps/grgsm_trx
+++ b/apps/grgsm_trx
@@ -46,7 +46,7 @@
 	phy_tx_antenna = "TX/RX"
 	phy_rx_antenna = "RX2"
 	phy_rx_gain = 30
-	phy_tx_gain = 10
+	phy_tx_gain = 40
 	phy_args = ""
 	phy_ppm = 0