@Jleigh1 Nope. Returned it and got a new one from the store where I bought it from. New one worked.

Telia support say they those - more specifically 800, 2100, 2600 so it should be ok. Could there be a problem with the hardware? I have already done firmware update to the latest and greatest. I have...

I am not sure of the network type of the sim card, but since we are in sweden, its most likely a 3G/4G LTE GSM card. Just got a brand spanking new one from supplier http://telia.se I have tested it...

was your issue resolved after this? I have a brand new MR 400 Archer TP Link and it is not detecting the swedish sim card from Telia. I have also successfully patched to latest firmware!