Device recognize sim card but no signal and network - Xiaomi Redmi Note 4 Questions & Answers

My sim card is recognized but there is no net work service. Anyone help?

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XDA won't recognise SIM card present

Hi
Having followed all the instructions to unlock my XDA, and (I believe) doing it correctly, it still won't accept my SIM card and comes up with the error message:-
A SIM card is required, contact your service provider. Insert SIM and enter PIN.
I am on a vodafone contract, any ideas what the problem might be
Thanks
The SIM card you are using draws more than the standardised current. Unfortunately not all SIM card vendors conform to the standard.
Change SIM cards or try with external power.

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Moto g3 2015 - no sim card - emergency calls only

Hi, I have this problem that my moto g3 single sim version (XT1541) won't recognize my sim card and other sim cards as well, but not all, actually it recognizes only 2 operator sim cards which is strange. I tried my sim card in someone else's phone to make sure that the sim card was not the problem, and it worked without any issues.
The problem began soon after I removed my sim card without turning off the phone, and inserted another sim. The sim card was not detected then I returned my regular sim and was also not detected. It keeps on saying no sim card - Emergency calls only. I have tried everything from restarting, factory reset, reinstalling stock rom and *#*#4636#*#* with no luck. Like I said before the strange thing is that it only detects two operator sim cards namely Tigo and TTCL but does not detect other operator sim cards (tried 3 different onces). Does anyone know what the problem might be and how to solve this problem?
@zolong1
You might have to get the phone to a repair center.

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