Can I unlock a sprint galaxy s4 that's showing a error code?

[Android Central Question]

I have AT&T. I bought an sprint galaxy s4 off a friend and now want to unlock it so I can use it on my AT&T plan. Is this possible if it's showing an error code? The error code is: Unable to establish wireless data connection mip 67.

 

[hallux]

Here's a previous thread on this topic... https://forums.androidcentral.com/a...ion-response-mip-error-67-motorola-xt603.html

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[B. Diddy]

Welcome to Android Central! You won't be able to use it effectively on AT&T. The Sprint S4 doesn't support AT&T's LTE bands, and since AT&T shut down its 2G network, it relies on VoLTE for phone calls (although it's possible calls and data might work on 3G, but that would be a suboptimal exerience).

samsung.com/us/mobile/phones/galaxy-s/samsung-galaxy-s4-sprint-white-frost-16gb-sph-l720zwaspr/#specs
https://www.frequencycheck.com/carriers/at-t-united-states

EDIT: After a little more searching, it's possible the phone might work (once you get the MIP 67 error resolved), but it's difficult to tell -- the official Samsung site (linked above, which doesn't work thanks to the glitchy AC forum software:-\) states the LTE bands the phone supports are 25, 26, and 41, but other 3rd party sites claim it also supports bands 2 and/or 4, which AT&T uses).