Best time to change tariff to avoid pro rata billing?

[Viewfinder]

As per subject - from your experience, when is the best time to switch tariff and have no or as little pro rata split billing periods? I have been on simplicity for a while now and it doesn't have an inclusive data allowance other than web daily. I could add a data bolt on but not sure if I an best switching to a similar tariff with inclusive or stay as I am with bolt on.  It will be very low usage for email etc and not for any excessive browsing!

I also want to keep to the 1 month rolling contract and not have to change this.  If I want to change tariffs and go for a tariff with a little bit of data such as the 100 or 300, when is the best time to switch without much of an overlap?

Granted that a change of tariff might incur some delay or overlap, I don't mind a day or so.  I have searched the forums and there are incidents of some double billing etc so just wanted some clarification.  Is it usually a day before next billing date or some time else?

Thanks!

[MI5]

[Viewfinder]

Thanks Toby and everyone else that has helped here. Much appreciated!

[Cleoriff]

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@Viewfinder wrote:

Thanks Toby and everyone else that has helped here. Much appreciated!

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No problems... Hope it's sorted soon

[MI5]

I'm sure Toby just needs to tick a box somewhere in settings......?

[Toby]

Hey @Viewfinder,

It should now work, please sign in and out. Also, have you received an email verification from when you registered to the community? 

[Viewfinder]

Thanks @Toby, have signed in and out and back in...  This is test post.

I vaguely remember having to verify I think, but it was that long ago I couldn't begin to say what was in it.  Was there an error during registration that might have caused it?

[Viewfinder]

Hi @Toby, still no luck, no option to Edit... I checked Options within seconds of posting my last and then I checked again after logging out and back in. Still the same.

[Toby]

Hey @Viewfinder, try one more time for me? I've changed a few things behind the scenes.

[Viewfinder]

Apologies for delay, had to pop out. Okie dokie, test post so will try and edit this after posting...

[Viewfinder]

Nope sorry, still same as before, no Edit....

Mark As New still first option in list and no sign of Edit even after logging out, closing window and even clearing caches.