I also use Gammu, smstools was new to me. We've been using Gammu for over 5 years now for on-call alerts or other small services. It has worked very well with

I also use Gammu, smstools was new to me. We've been using Gammu for over 5 years now for on-call alerts or other small services. It has worked very well with an ordinary 3G dongle you can buy to get mobile internet on your laptop. The SIM card is provided by the company since we're a large telco we get pretty much free unlimited SMS from them. This has been used in two different data centres without any reception issues, even though they're properly shileded data centres and we have no external antennae. Only issues have been forced re-seats of the USB dongle a few times a year, most likely due to oxidation on the connector.