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My Question is: Which is more secure?

WLAN Access Point (Having it home without Sim-Card, via Ethernet Cable and maybe Wifi disabled if it is possible)

Portable WLAN Router (With Sim Card, Wifi disabled and just via Ethernet Cable)
I like the portable Version because I can take it with me but I have concerns about the Sim-Card. And I'm wondering if Home based WLAN Access Pointed Router without Sim-Card is more secure/private?

Or GrapheneOS Second Phone with Sim-Card as Hotspot and with VPN, instead of Mobile Router.

Or is there a more secure approach? And what would it like be? It would help me so much!