diff --git a/CHANGELOG.md b/CHANGELOG.md
index a586a3e..d07156c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ v1.6
 - Fix FLEXIAPI-192 Add DotEnv configuration to allow the expiration of tokens and codes in the app
 - Fix FLEXIAPI-196 Add a phone validation system by country code with configuration panels and related tests and documentation
 - Fix FLEXIAPI-203 Implement domain based Linphone configuration, add documentation, complete API endpoints, complete provisioning XML
+- Fix FLEXIAPI-208 Add SMS templates documentation
 
 v1.5
 ---
diff --git a/README.md b/README.md
index 7d42541..3231437 100644
--- a/README.md
+++ b/README.md
@@ -204,6 +204,17 @@ You can also seed the tables with test accounts for the liblinphone test suite w
 
     php artisan accounts:seed /path/to/accounts.json
 
+## SMS templates
+
+To send SMS to the USA some providers need to validate their templates before transfering them, see [Sending SMS messages to the USA - OVH](https://help.ovhcloud.com/csm/en-ie-sms-sending-sms-to-usa?id=kb_article_view&sysparm_article=KB0051359).
+
+Here are the currently used SMS templates in the app to declare in your provider panel:
+
+- Recovery code: `Your #APP_NAME# creation code is #CODE#`
+- Validation code: `Your #APP_NAME# recovery code is #CODE#`
+- Validation code: `Your #APP_NAME# validation code is #CODE#`
+- Validation code with expiration: `Your #APP_NAME# validation code is #CODE#. The code is available for #CODE_MINUTES# minutes`
+
 ## Custom email templaces
 
 Some email templates can be customized.
diff --git a/flexiapi/app/Services/AccountService.php b/flexiapi/app/Services/AccountService.php
index 17a6c34..e55aceb 100644
--- a/flexiapi/app/Services/AccountService.php
+++ b/flexiapi/app/Services/AccountService.php
@@ -241,8 +241,14 @@ class AccountService
 
         Log::channel('events')->info('Account Service: Account phone change requested by SMS', ['id' => $account->identifier]);
 
+        $message = 'Your ' . config('app.name') . ' validation code is ' . $phoneChangeCode->code . '.';
+
+        if (config('app.recovery_code_expiration_minutes') > 0) {
+            $message .= ' The code is available for ' . config('app.recovery_code_expiration_minutes') . ' minutes';
+        }
+
         $ovhSMS = new OvhSMS();
-        $ovhSMS->send($request->get('phone'), 'Your ' . config('app.name') . ' validation code is ' . $phoneChangeCode->code);
+        $ovhSMS->send($request->get('phone'), $message);
     }
 
     public function updatePhone(Request $request): ?Account
@@ -381,10 +387,10 @@ class AccountService
     {
         $account = $this->recoverAccount($account);
 
-        $message = 'Your ' . config('app.name') . ' validation code is ' . $account->recovery_code . ' .';
+        $message = 'Your ' . config('app.name') . ' validation code is ' . $account->recovery_code . '.';
 
         if (config('app.recovery_code_expiration_minutes') > 0) {
-            $message .= 'The code is available for ' . config('app.recovery_code_expiration_minutes') . ' minutes';
+            $message .= ' The code is available for ' . config('app.recovery_code_expiration_minutes') . ' minutes';
         }
 
         $ovhSMS = new OvhSMS();