[wormvortex]

how do i change it? There must be a way it's like 4atm and bloody annoying. Have a t-mobile sim if that helps.

[Orinj]

It's not the number of rings, but the duration set at a network level. With T-Mobile I think their default setting is 15 seconds, which is probably 4 rings. You can change it from most phones under your diverts or voicemail settings. Alternatively, I can probably find the command to set it yourself using network codes.

[tomd84]

If not give T-Mobile a bell and they will change it for you

[r2001uk]

Can you not do it on the menu you get when you call your voicemail?

I haven't done it for years, but I remember Orange used to let you adjust in via the voicemail menu.

But yeah, easiest way would be to call 150 and get an operator to do it for you