diff --git a/install.sh b/install.sh
index 3377d11..4a31292 100644
--- a/install.sh
+++ b/install.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # D-Star Site Install Script
-# For Raspberry Pi 3 running Raspberry Pi OS Lite
+# For Raspberry Pi 3B running Raspberry Pi OS Lite (64-bit)
 # Usage: sudo bash install.sh
 
 set -e
@@ -45,14 +45,42 @@ echo "Installing ZeroTier..."
 curl -s https://install.zerotier.com | bash
 zerotier-cli join $ZEROTIER_NETWORK
 echo "ZeroTier installed and joined network $ZEROTIER_NETWORK"
-echo "NOTE: Approve this device in ZeroTier Central before continuing"
 echo ""
-read -p "Press ENTER once device is approved in ZeroTier Central..."
+echo "NOTE: Approve this device in ZeroTier Central before continuing"
+read -p "Press ENTER once device is approved..."
 
-# Enable serial port
+# Configure serial port for MMDVM board
 echo "Configuring serial port..."
-raspi-config nonint do_serial_hw 0
-raspi-config nonint do_serial_cons 1
+
+# Modern Pi OS - config in /boot/firmware/config.txt
+CONFIG_FILE="/boot/firmware/config.txt"
+if [ ! -f "$CONFIG_FILE" ]; then
+    # Fall back to old path
+    CONFIG_FILE="/boot/config.txt"
+fi
+
+# Disable Bluetooth and enable UART for MMDVM board
+if ! grep -q "dtoverlay=disable-bt" "$CONFIG_FILE"; then
+    echo "" >> "$CONFIG_FILE"
+    echo "# MMDVM Board - disable BT, enable hardware UART" >> "$CONFIG_FILE"
+    echo "dtoverlay=disable-bt" >> "$CONFIG_FILE"
+    echo "enable_uart=1" >> "$CONFIG_FILE"
+    echo "Serial port configured in $CONFIG_FILE"
+fi
+
+# Disable serial console so Linux doesn't use the UART
+echo "Disabling serial console..."
+systemctl stop serial-getty@ttyAMA0.service 2>/dev/null || true
+systemctl disable serial-getty@ttyAMA0.service 2>/dev/null || true
+
+# Remove serial console from cmdline.txt
+CMDLINE_FILE="/boot/firmware/cmdline.txt"
+if [ ! -f "$CMDLINE_FILE" ]; then
+    CMDLINE_FILE="/boot/cmdline.txt"
+fi
+sed -i 's/console=serial0,[0-9]* //' "$CMDLINE_FILE"
+sed -i 's/console=ttyAMA0,[0-9]* //' "$CMDLINE_FILE"
+echo "Serial console removed from $CMDLINE_FILE"
 
 # Add pi user to dialout
 usermod -a -G dialout pi
@@ -102,7 +130,6 @@ echo "Installing systemd service..."
 cp "$REPO_DIR/services/mmdvmhost.service" /etc/systemd/system/
 systemctl daemon-reload
 systemctl enable mmdvmhost
-systemctl start mmdvmhost
 
 echo ""
 echo "================================================"
@@ -112,8 +139,12 @@ echo ""
 echo "ZeroTier status:"
 zerotier-cli status
 echo ""
-echo "Service status:"
-systemctl status mmdvmhost --no-pager
+echo "A reboot is required to activate serial port changes."
 echo ""
-echo "Logs:"
-echo "  journalctl -u mmdvmhost -f"
+read -p "Reboot now? [y/N]: " REBOOT
+if [ "$REBOOT" = "y" ] || [ "$REBOOT" = "Y" ]; then
+    reboot
+else
+    echo "Run 'sudo reboot' when ready."
+    echo "MMDVMHost will start automatically after reboot."
+fi