diff --git a/esphome/components/sim800l/sim800l.cpp b/esphome/components/sim800l/sim800l.cpp
index 1390ef8b49..9f8c733fa9 100644
--- a/esphome/components/sim800l/sim800l.cpp
+++ b/esphome/components/sim800l/sim800l.cpp
@@ -97,7 +97,7 @@ void Sim800LComponent::parse_cmd_(std::string message) {
     case STATE_CREGWAIT: {
       // Response: "+CREG: 0,1" -- the one there means registered ok
       //           "+CREG: -,-" means not registered ok
-      bool registered = message.compare(0, 6, "+CREG:") == 0 && message[9] == '1';
+      bool registered = message.compare(0, 6, "+CREG:") == 0 && (message[9] == '1' || message[9] == '5');
       if (registered) {
         if (!this->registered_)
           ESP_LOGD(TAG, "Registered OK");