#!/bin/sh
MODEM_INTF=$1
[ -z "$MODEM_INTF" ] && return
SIGNAL_INFO=$(mmcli -m $MODEM_INTF --output-keyvalue)
[ -z "$SIGNAL_INFO" ] && return
PERCENT=$(echo $SIGNAL_INFO | grep 'status.signal-quality' | awk -F": " '{print $2}')
echo $PERCENT