diff --git a/controllers/ListenController.js b/controllers/ListenController.js
index 91a8993..03fec26 100644
--- a/controllers/ListenController.js
+++ b/controllers/ListenController.js
@@ -368,8 +368,8 @@ async function commitMessage(now, logDevice) {
 			}
 
 			const time = moment.unix(logDevice.crt_d + TIMEFIX).format("DD MMM YYYY HH:mm:ss")
-			address = address.substring(0, 60)
-			const rawMsg = `${nopol} | OVERSPEED | ${time} | ${logDevice.speed} km/h | ${address}`.trim()
+			address = sanitizeForGsm(address)
+			const rawMsg = `${nopol} | OVERSPEED | ${time} | ${logDevice.speed} km/h | ${address}`.substring(0, 150).trim()
 			// const rawMsg = `${nopol} | OVERSPEED | ${time} | ${logDevice.speed} km/h`.trim()
 			const countryCode = process.env.SMS_COUNTRY_CODE ?? "670"
 			const smsHost = process.env.SMS_HOST ?? "http://192.168.40.2:8181"
@@ -839,6 +839,29 @@ class ListenController {
 	}
 }
 
+function sanitizeForGsm(text) {
+	// 1. Map symbols and ligatures that do not normalize cleanly
+	const customMap = {
+		'€': 'EUR', '£': 'GBP', '¥': 'JPY',
+		'ß': 'ss', 'æ': 'ae', 'Æ': 'AE', 'œ': 'oe', 'Œ': 'OE',
+		'“': '"', '”': '"', '‘': "'", '’': "'", '…': '...',
+		'–': '-', '—': '-'
+	};
+
+	// Replace custom mapped characters
+	let mappedText = text.replace(
+		/[€£¥ßæÆœŒ“”‘’…–—]/g,
+		match => customMap[match]
+	);
+
+	// 2. Normalize and strip diacritics
+	// .normalize('NFD') splits characters like 'é' into 'e' + '´'
+	// The regex /[\u0300-\u036f]/g matches and removes those detached accent marks
+	let cleanText = mappedText.normalize('NFD').replace(/[\u0300-\u036f]/g, '');
+
+	return cleanText;
+}
+
 const object = new ListenController()
 
 module.exports = object