Reliance had closed all it’s Voice call services in December due to this all of Reliance users has to Port other (Mobile Number Portability) networks many of all ready Port out But many of still did not Port out and Now No Mobile network coming that’s why You can not generate UPC code now on.
It will arise very serious issue that you can not use your number to call or any other mobile services even their customer care number is now stopped working so user has no access to generate Porting code.
Currently closing of Reliance Operator is long time past and mostly OLD customer are port out in different operator and I hope you also done if you have not done and wana port out please try below method if it work out greta or call customer care to get UPC code still not able to Generate UPC code please comment below so i sort out.