Wireless Joint

You are not showing that the sim is recognized. Your modem IMEI is but no sim ICCID number is being displayed. Could be it is not inserted properly.

I have the same router/modem---new to me (rig)
trying to get up with a Verizon tablet plan-post paid, that I know works in another router--no love.
I got this info over on the FB site, and it worked for me. run each command and wait for an (ok) on last command, wait--it should reboot on it's own ...

Agree with MattB29, this looks like a SIM issue, for now. Check that you have it properly inserted. If you are using an adapter, like the Noosy, make sure you have it properly aligned in the adapter and very carefully insert it. They are prone to get loose in the adapter as you insert into the modem ...

The WG1608 is just a router correct? what modem are you using in it?

When you say:
The sim card works fine in the Coolpad Surf it came in, but the WG1608 with the latest firmware doesn't detect it at all.
Are you saying that the router doesn't detect the sim card at all? Or some other connection ...

Just updating, wg1608/em12: installed mobcitizen coolpad's nano sim via noosy into wg1608, no problems.
I agree with BDF, put another SIM in it, I could be wrong but an unactivated one would probably show the SIM # too.
If you can't exchange it then i'd check the solder on the SIM card receptacle ...

Could you pull the Sim from your phone and see if the EM160 will read it? Just to help with the process of elimination.

about to be getting a wg1608 em12-g tomorrow or next day with noosy adapter. I also have Coolpad Surf (connectall) will report back on how my sim situation goes in case it helps at all. Monitoring this thread in the mean time.