diff --git a/backend/nalogru/client.go b/backend/nalogru/client.go
index fa85eb2..dcbe7ca 100644
--- a/backend/nalogru/client.go
+++ b/backend/nalogru/client.go
@@ -80,6 +80,12 @@ type TicketIdResponse struct {
 	Status int    `json:"status"`
 }
 
+type PhoneAuthRequest struct {
+	ClientSecret string `json:"client_secret"`
+	Os           string `json:"os"`
+	Phone        string `json:"phone"`
+}
+
 // GetTicketId - send ticket id request to nalog.ru API.
 func (nalogruClient *Client) GetTicketId(queryString string, device *device.Device) (string, error) {
 	payload := TicketIdRequest{Qr: queryString}
@@ -231,6 +237,33 @@ func (nalogruClient *Client) GetElectronicTickets(device *device.Device) ([]*Tic
 	return tickets, nil
 }
 
+func (nalogruClient *Client) AuthByPhone(device *device.Device) error {
+	payload := PhoneAuthRequest{
+		ClientSecret: device.ClientSecret,
+		Os:           "android",
+		Phone:        device.Phone,
+	}
+
+	req, err := json.Marshal(payload)
+	if err != nil {
+		log.Println("Unable to serialize request")
+		return err
+	}
+	reader := bytes.NewReader(req)
+	url := nalogruClient.BaseAddress + "/v2/auth/phone/request"
+	request, err := http.NewRequest(http.MethodPost, url, reader)
+	addHeaders(request, device.Id.Hex())
+	client := createHttpClient()
+	_, err = sendRequest(request, client)
+
+	if err != nil {
+		log.Printf("Can't POST %s\n", url)
+		return err
+	}
+
+	return nil
+}
+
 func (nalogruClient *Client) sendAuthenticatedRequest(r *http.Request, device *device.Device) (*http.Response, error) {
 	addHeaders(r, device.Id.Hex())
 	addAuth(r, device.SessionId)
@@ -262,6 +295,7 @@ type RefreshResponse struct {
 	RefreshToken string `json:"refresh_token"`
 }
 
+// RefreshSession used to refresh session by RefreshToken.
 func (nalogruClient *Client) RefreshSession(device *device.Device) error {
 	client := createHttpClient()
 
diff --git a/backend/nalogru/client_test.go b/backend/nalogru/client_test.go
index 2c02761..4845767 100644
--- a/backend/nalogru/client_test.go
+++ b/backend/nalogru/client_test.go
@@ -11,10 +11,11 @@ import (
 )
 
 var baseAddress = "https://irkkt-mobile.nalog.ru:8888"
-var sessionId = "606c4bb41d8f48ff57bfd021:6ca239ba-0885-4cc9-a7d9-be801253ac7d"
+var sessionId = "INSERT SESSION ID HERE"
 var deviceId = primitive.NewObjectID().Hex()
-var secret = "mnALjKobrqT/sC9um4wXlamXnOo="
-var refreshToken = "c55bdf44-acf6-46b3-be9a-8422bda7032d"
+var secret = "INSERT SECRET HERE"
+var refreshToken = "INSERT REFRESH TOKEN HERE"
+var phone = "INSERT PHONE HERE"
 
 func IgnoreTestClient_GetTicketId(t *testing.T) {
 	d, err := createDevice()
@@ -84,6 +85,7 @@ func createDevice() (*device.Device, error) {
 		Update: func(string, string) error {
 			return nil
 		},
+		Phone: phone,
 	}
 	return d, err
 }
@@ -194,6 +196,20 @@ func IgnoreTestHttpClient_Error(t *testing.T) {
 	}
 }
 
+func IgnoreTest_AuthByPhone(t *testing.T) {
+	d, err := createDevice()
+	if err != nil {
+		log.Println(err)
+		t.Fail()
+		return
+	}
+	client := NewClient(baseAddress)
+	err = client.AuthByPhone(d)
+	if err != nil {
+		t.Fatalf("Error auth by phone %v", err)
+	}
+}
+
 func createServer(t *testing.T) *httptest.Server {
 	return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		_, err := w.Write([]byte("Hello"))