Read quite a bit of this thread, and I'm being dense, but I'm not quite understanding how the Sim2Fly top up works...let's say I buy an eSIM but I need 14 days of usage...when exactly can I load up my 299Baht top ups? Do I have to wait til the 8 days or 5GB of data are over? Or can I "prebuy" top ups and just enter it into my account? Just want to buy one or two top ups before I leave and "set it and forget it," basically. Thanks