Question about Digitec iot Data Flat

Yes, it will likely fit, provided the router supports a nano-SIM and runs on the Sunrise network. The TP-Link M8550 has a nano-SIM slot and supports 3G, 4G, and 5G; furthermore, this SIM uses the Sunrise network. The difference compared to the Digitec IoT test SIM card cannot be clearly verified here; the available information shows the same plan for both, with 30 days, unlimited data, and 10 Mbit/s. The information is insufficient to confirm a definitive difference.