Hello, I need to place GPS locators in several trucks that work on the basis of a sim card. How to do it the cheapest now? I mean which SIM card to choose and what tariffs to use in it? The locator must connect to the Internet both in Poland and abroad (European Union). What kind of starters to use? I would like to add that something without the account validity limit would be useful, so that you do not have to watch over when to top up a given starter.