Cheap Simple Pre-Loaded Sim Card?
So I am looking at making some GPS/GSM trackers which are attached to a vehicle and then used in the case of theft. They would be powered by the car's electrical and would also have a separate backup battery in case the thieves were smart and disconnected the electronics. The only problem I have seen in planning is the requirement for a sim card on GSM modules. I understand that I will be required to pay for service, but I need long range, maybe even international service which can send maybe 20 text messages at most. A pay as you go would be reasonable too. I just don't want to pay a monthly fee for a fake phone which just sits on a car doing nothing most of the time and doesn't actually do anything until it is called or texted. Any car trackers I have found don't offer wireless capabilities and I really think my device would be useful.