diff --git a/plugins/mbm/77-mm-ericsson-mbm.rules b/plugins/mbm/77-mm-ericsson-mbm.rules
index 28134a49..a4c7dcbb 100644
--- a/plugins/mbm/77-mm-ericsson-mbm.rules
+++ b/plugins/mbm/77-mm-ericsson-mbm.rules
@@ -57,6 +57,9 @@ ATTRS{idVendor}=="0bdb", ATTRS{idProduct}=="1927", ENV{ID_MM_ERICSSON_MBM}="1"
 # Ericsson C3304w
 ATTRS{idVendor}=="0bdb", ATTRS{idProduct}=="1928", ENV{ID_MM_ERICSSON_MBM}="1"
 
+# Ericsson C5621 TFF
+ATTRS{idVendor}=="0bdb", ATTRS{idProduct}=="1936", ENV{ID_MM_ERICSSON_MBM}="1"
+
 # Sony-Ericsson MD300
 ATTRS{idVendor}=="0fce", ATTRS{idProduct}=="d0cf", ENV{ID_MM_ERICSSON_MBM}="1"