How is Verizon capable of blocking the *#0*# diagnostics menu

"@andre_faughn . Which Samsung phone do you have?

Yes, Verizon has final say what goes into the firmware on Samsung phones that they sell.

Tmobile and AT&T do the same.

It also could be that Samsung has retired the codes you mentioned and changed the access code for the diagnostic menu, or Verizon disabled them as you suggested. A very good reason why it would be disabled or changed is because Galaxy 2 ,3, 4, and early 5, had a specific order you go through the menu and it would unlock the phone permanently. Obviously, the telecoms aren't happy about this, especially when these phones are sold at a discounted price.

Alternate ROMs may have these codes still."

I know this is an old thread, but I haven’t had much luck on this. I have an UNLOCKED S10+ on Verizon. I bought it directly from Samsung, and it is clearly unlocked. I am unable to access the diagnostic codes on the Verizon network. I didn’t think of trying it before I put their SIM in. I have tried it after clearing the partition cache , SIM in, SIM out, even in safe mode and every combination thereof. How does Verizon block it that way? Is it possible to bypass it? I’ve talked to Verizon Tier 2 CS and they were unable to help. My local store wasn’t much help either. Any ideas?

*#0*# is not working