I was investigating solutions for sensor SMS notifications & the best IoT type SIM plan that I came across was https://www.hologram.io/pricing/flexible-data htt

I was investigating solutions for sensor SMS notifications & the best IoT type SIM plan that I came across was https://www.hologram.io/pricing/flexible-data https://www.hologram.io/pricing/flexible-data . $1.50/line per month, $0.19/outbound SMS, data is pricey. If you need more SMS, the next cheapest I've used is RedPocket Mobile-- https://www.ebay.com/itm/2-50-Mo-Red-Pocket-Prepaid-Plan-200-Talk-1000-Text-200MB/133196831828 https://www.ebay.com/itm/2-50-Mo-Red-Pocket-Prepaid-Plan-200... - $30/yr for 200 voice/1000 texts/200mb per month on T-Mobile's network.