Zyxel NR5101 5G Router

TemporisCaptial

My device has stopped detecting the SIM, please advise a way to resolve this.

Its not the sim, it works in my phone.

Firmware upgrade has done nothing.

Device reset has not changed the status.

Anything else I can try?

Friday

Hi @TemporisCaptial ,

We suspect issue may relate to the thickness of nano SIM card and nano adapter,

is it possible that you add duct tape in the back of the SIM card and adapter to increase the thickness and see if slove the issue?

thank you !

TemporisCaptial

Thank you for your response.

I can certainly try this however I've since worked out that it only seems to not detect the SIM when trying to use 5G, when I change to 4G the router works (same SIM).

Friday

Hi @TemporisCaptial ,

Thank you for providing the crucial info.

Is your sim a 5G sim card? can you check the supported 5G band and

select that specific band on GUI?

by accessing Broadband>Cellular Band>Band Management

disable Band auto selection.

Thank you !

dzmitry_lahoda

i have similar issue. sim disappeared in zyxel after months of work(so with some one or two a day offline periodical for some minutes).

now visible and working in phone.

cleaned up sim, was covered by some thing (after months just being in zyxel, place is not wet as other devices and wood are ok here).

sim was made visible, but pin input apply failed several times.

moved sim out, removed pin in phone, inserted back, does not see sim.

tried other sim, restarts, etc. sim is not visible.

dzmitry_lahoda

tried to upgrade firmware, did not help