Operating system name and version: 18.04.1-Ubuntu
Version of smsd: 3.1.21
Smsd installed from: sources / package repository / from elsewhere...http://smstools3.kekekasvi.com/packages/smstools3-3.1.15.tar.gz
Name and model of a modem / phone:HUAWEI,
Interface: serial / USB / some adapter...USB

Hello,

Can I balance sms load by using 3 modems??? if I can how can I do my configurations to do this?

Thank you.

Please check this topic:
Sample script for load balancing using the checkhandler

Thank You very much.