is anyone having network issues with galaxy z fold 3??

Is this issue resolved for whoever tried the code *#2263#?  I have tried in my mobile I can't completely say it's resolved but its better than before.  But I have noticed my battery is draining too fast now after trying this code.  As long as I'm connected to WIFI and turned on WIFI calling there is no issues as long as my WIFI works properly.  But the minute I step out of home issue kicks in with in 5 miles drive my network connectivity is getting lost at least 5 times.

Do you guys have T-Mobile variant of Z Fold 3?  Mine is an unlocked variant direct from Samsung.  I'm about to give up on this issue, tried calling T Mobile, Samsung and took it to the Service center but no resolution so far, Samsung cannot exchange my mobile, instead have to ship my mobile and wait for 11 business days without a phone.  Don't have a backup phone either.  This is really ridiculous, spending almost $2000 for a phone and pay for the top of the line mobile plan but ending up having network issues cant even make a reliable phone call or browse the internet without WIFI.