Until now I had used this LTE router from TP-Link with a Swisscom SIM and had excellent download and upload rates (>20Mbit/s). Now I have switched to a yallo Go subscription (Sunrise). Basically it works and connects. However, extremely slow. Only 1Mbit/s download and 2Mbit/s upload. But the yallo Go would nominally also have a higher data rate. My smartphone has much higher throughputs at the same position in the yallo network. Does anyone use the device in the Sunrise network? What could be the reason for this?
I can now answer the question myself: With Swisscom, I use LTE band 3 (1600MHz). Sunrise/yallo uses LTE band 20 (800MHz). The latter allows coverage of a larger area (e.g. in the countryside), but usually at lower speeds. In my case, the Sunrise band 20 is significantly stronger than the Sunrise band 3, which is why the router selects the slower band 20. The official firmware does not allow manual selection. However, there is a beta firmware in which you can select the band (Google search helps). Installed and selected band 3 manually. And look: at least 9Mbit/s up and down. I can live with that as a backup internet connection.
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