diff --git a/plugins/77-mm-ericsson-mbm.rules b/plugins/77-mm-ericsson-mbm.rules
index 6a5ec8f29766b31d7652f80b5bf0a78929b317ae..fa94eceefa5f4820d95b3bef1c835dad2264c916 100644
--- a/plugins/77-mm-ericsson-mbm.rules
+++ b/plugins/77-mm-ericsson-mbm.rules
@@ -54,6 +54,9 @@ ATTRS{idVendor}=="0bdb", ATTRS{idProduct}=="1926", 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"