diff --git a/README.md b/README.md
index 59bc900..50528a3 100644
--- a/README.md
+++ b/README.md
@@ -114,7 +114,8 @@ Watch this repo for new updates! And of course, contributions are welcome ;)
 
 **Location**
 - GPS/GNSS
-    - SIM808, SIM7000, SIM7500/7600/7800 only
+    - SIM808, SIM7000, SIM7500/7600/7800, BG96, u-blox
+    - NOTE:  u-blox chips do NOT have embedded GPS - this function only works if a secondary GPS is connected to primary cellular chip over I2C
 - GSM location service
     - SIM800, SIM7000, Quectel, u-blox