diff --git a/lib/modem.js b/lib/modem.js
index 8ed3dba..2c7e173 100644
--- a/lib/modem.js
+++ b/lib/modem.js
@@ -316,14 +316,16 @@ async function sendSMS(destination, msg) {
  */
 function executeUSSD(code, includeCUSD2) {
     return new Promise(async (resolve) => {
-        const parserMain = new ParserRegex({ regex: REGEX_WAIT_FOR_OK_OR_ERROR });
+        const parserMain = new ParserReadline({ delimiter: '\r\n' });
+        // const parserMain = new ParserRegex({ regex: REGEX_WAIT_FOR_OK_OR_ERROR });
         parserMain.on('data', (data) => {
             port.unpipe(parserMain);
             mutex.releaseLockWaitForSubCommand();
             resolve(data);
         });
 
-        const parserCUSD2 = new ParserRegex({ regex: REGEX_WAIT_FOR_OK_OR_ERROR });
+        const parserCUSD2 = new ParserReadline({ delimiter: '\r\n' });
+        // const parserCUSD2 = new ParserRegex({ regex: REGEX_WAIT_FOR_OK_OR_ERROR });
         parserCUSD2.on('data', () => {
             port.unpipe(parserCUSD2);
             mutex.releaseLockWaitForSubCommand();