You need to do it on 3g connection.
Drop down in the network settings or try it with wifi and data off completely.
Hey @ChrisMiller1620 were you able to extend your ring time or do you still need some assistance with this?
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I tried this but keep getting same reply. Could my phone be a European one and need different code. I ask because It displays lte instead of 4g
LTE is 4g so no, that doesn't influence it.