diff --git a/alert.go b/alert.go
index 8109738..8c53a78 100644
--- a/alert.go
+++ b/alert.go
@@ -2,6 +2,7 @@ package main
 
 import (
         "fmt"
+        "strings"
         "io/ioutil"
         "log"
         "time"
@@ -37,5 +38,10 @@ func sendSMS(phonenumber string, alertMessage string) {
 
 func sendAlert(deveui string, alertMessage string) {
   fmt.Printf("sendAlert: deveui=%s, message=%s\n", deveui, alertMessage)
-  sendSMS("41765006123",alertMessage)
+  smsnumber := getSmsnumber(deveui)
+  if (smsnumber != "") {
+    // we strip of the leading +
+    smsnumber = strings.Replace(smsnumber, "+", "", -1)
+    sendSMS(smsnumber,alertMessage)
+  }
 }
diff --git a/persistence.go b/persistence.go
index 3d0df42..f9ff1f3 100644
--- a/persistence.go
+++ b/persistence.go
@@ -141,3 +141,20 @@ func getDevAlias(deveui string) string {
 
         return res
 }
+
+func getSmsnumber(deveui string) string {
+        res := ""
+        if deveui == "" {
+           return res
+        }
+
+        conn := globalPool.Get()
+        defer conn.Close()
+
+	smsnumber, err := redis.String(conn.Do("HGET", devPrefix+deveui, "smsnumber"))
+        if err == nil {
+          res = smsnumber
+        } 
+
+        return res
+}