No signal and No IMEI is showing.

Im having the same problem. The component is the baseband module. Have you fixed the problem?

My device is having same behavior and I have seen this happen with other devices that have back damage from what I have been researching but as far as the specific chip its not outlined on the self repair manual I personally have an iPhone 12 Pro but would need help with finding the name of the hardware component.

Hello, I have the same problem with an iPhone 11, the problem is caused by the baseband located on the logic board, mine was also caused by a shock to the back of the phone while changing back glass. Hope this helps you !

Put a another sim card and check if you got the network. Sim may be faulty.

You may get the IMEI number by Settings-- General--About---Scroll down to check the IMEI no.

IMEI is not showing up related to a motherboard problem what is fixible but not cheap :/ Can you provide which iPhone you have?

I tried dialing *#06#. BUt when I dial it IMEI is not diplaying.

I put my sim card to another phone it is working.

I think problem with the mobile phone. Can i know how to fix it ?

Just try putting a another sim card and check with the iphone.

Look in settings>General>About.

Do you se an IMEI there?