LTE Carrier supporting IPv6 ?

I want to experiment with IPv6 and need a second ISP connection to access primary ISP and Netgear Orbi WiFi system.  Am considering a Netgear LM1200.  The User Manual says it supports both IPv4 and IPv6.

 

Does anyone have experience*** with the LM1200 and an LTE cellular service which definitely supports IPv6?

(The LM1200 claims compatibility with AT&T, T-Mobile, and Verizon.)

 

p.s. Is there a "better way" to approach this?  I have tried creating a Hot Spot on my cell phone, but it appears not to support IPv6.  (Maybe a really expensive newer cell phone Hot Spot would support IPv6??)

 

*** My experience asking questions of cellular providers has not been exactly encouraging.