Questions about Telekom 5G receiver SE white

Does anyone now have this 5G router in use with a Swisscom or Sunrise SIM card?

This receiver will likely not work with any Swiss mobile networks. It connects (I see it in Swisscom devices dashboard), but looking through UI, and reading some T-Mobile forums it seems that T-Mobile uses IPv6 as end-user address, and none of major Swiss networks assign IPv6 addresses. Maybe some MNVOs do, dunno (but not Digitec/Digital-Republic). If any network assigned IPv6 address, it's still not certain it'd work. T-Mobile uses some complex 646XLAT in their backbone (translation of IPv4 into IPv6), so I suspect the SmartSomething router encapsulates IPv4 into IPv6 for the receiver. It's possibly a replicable procedure on Linux, or on Mikrotik, but it's hard to gurantee that w/o having T-Mobile sim-card to do some testing. If someone goes to DE, and buys a prepair card, I'll be happy to give it a try ;)

REFUSED to work with ANY SWISS SIM CARD.. RETURNED ..

Does this unit come with a power supply, or is POE a requirement?

Can this 5G receiver only be used as a "bridge" in combination with a router from another manufacturer, e.g. "UniFi Dream Machine"? Can we technically use SIM cards from any provider in Switzerland that offers 5G, e.g. Swisscom, Sunrise, Galaxus Mobile, digital republic?