VoLTE issue
Dear all, I have a iphone 6.5 using Simba carrier in singapore and the only way I can make regular calls is by volte.
The problem is I don't have that option to enable volte.
Ios 15.7.4 (19H321)
Settings - mobile data - mobile data options - voice & data - only see 3 options lte, 3g, 2g.
Please help.
Earlier iPhone models