Same here. Straight talk did some type of "fix" over the air on my unlocked Verizon S9+ and had me reboot the phone, at which point I lost my previously working Volte. Spent hours with them on tech support call to no avail. They had mentioned Volte which was a new term for me, and brought me here to confirm my suspicion that the Straight talk "fix" had stolen my ability to use data while on a voice call. The add button on APN is now grayed out also. I'll be sourcing a new provider.
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