Handsets reporting wrong MNCs issue

Dear All.

We have about 1.5% registration failure rate for some SBCs and on analysis we found few handsets are reporting wrong MNCs.

Did anyone come across such case?

Those seems UEs bought from other countries for which VoLTE will not work.

So you can expect all kind of wrong SIP messages.

No these are from India only, some Chinese brand.

Is there any solution?

Flash the UEs with official software of your network operator, same like the ones sold in store.

I bet those UEs were not sold in store, official store of operator.