Firebase电话身份验证中未触发发送的代码

Question

我正在Firebase中进行短信身份验证。我正在使用以下代码。

Firebase.Auth.FirebaseAuth auth = 
Firebase.Auth.FirebaseAuth.DefaultInstance;
phoneNumber = "+919092080955";//state the phone number here first
uint phoneAuthTimeoutMs = 10000;
PhoneAuthProvider provider = PhoneAuthProvider.GetInstance(auth);
provider.VerifyPhoneNumber(phoneNumber, phoneAuthTimeoutMs,null,
verificationCompleted: (credential) => {

},
verificationFailed: (error) => {

},
codeSent: (id, token) => {
    MyText.text = "SMS Has been sent " + id;
},
codeAutoRetrievalTimeOut : (id) => {

});

MyText.text + =“ HMM”;'

我的手机未收到短信。发送的代码未触发。错误消息也未触发。

我正在使用Unity 2018。

我的代码有什么问题...