diff --git a/admin/class-twp-admin.php b/admin/class-twp-admin.php
index 8643b44..7c278ba 100644
--- a/admin/class-twp-admin.php
+++ b/admin/class-twp-admin.php
@@ -8253,20 +8253,40 @@ class TWP_Admin {
 
                 // Check if SDK loaded and initialize
                 debugLog('jQuery ready');
+
+                // Don't wait for window.load - it may not fire on mobile
+                // Instead, poll for Twilio SDK availability
+                var sdkCheckAttempts = 0;
+                var maxSdkCheckAttempts = 50; // 5 seconds max
+
+                function checkAndInitialize() {
+                    sdkCheckAttempts++;
+                    debugLog('SDK check #' + sdkCheckAttempts + ': ' + (typeof Twilio));
+
+                    if (typeof Twilio !== 'undefined' && Twilio.Device) {
+                        console.log('Twilio SDK loaded successfully');
+                        debugLog('SDK OK, initializing...');
+                        initializeBrowserPhone();
+                    } else if (sdkCheckAttempts < maxSdkCheckAttempts) {
+                        // Keep checking every 100ms
+                        setTimeout(checkAndInitialize, 100);
+                    } else {
+                        showError('Twilio Voice SDK failed to load. Please check your internet connection and try refreshing the page.');
+                        console.error('Twilio SDK not found after ' + sdkCheckAttempts + ' attempts.');
+                        debugLog('SDK FAILED after ' + sdkCheckAttempts + ' attempts');
+                    }
+                }
+
+                // Start checking after a brief delay
+                setTimeout(checkAndInitialize, 500);
+
+                // Also keep the window.load as backup for desktop
                 $(window).on('load', function() {
-                    debugLog('Window loaded');
-                    setTimeout(function() {
-                        debugLog('Checking Twilio: ' + (typeof Twilio));
-                        if (typeof Twilio === 'undefined') {
-                            showError('Twilio Voice SDK failed to load. Please check your internet connection and try refreshing the page.');
-                            console.error('Twilio SDK not found. Script may be blocked or failed to load.');
-                            debugLog('SDK FAILED');
-                        } else {
-                            console.log('Twilio SDK loaded successfully');
-                            debugLog('SDK OK, initializing...');
-                            initializeBrowserPhone();
-                        }
-                    }, 1000);
+                    debugLog('Window loaded (backup)');
+                    if (typeof Twilio !== 'undefined' && !device) {
+                        debugLog('Backup init triggered');
+                        initializeBrowserPhone();
+                    }
                 });
                 
                 // Clean up on page unload