Difference between Upgrade and SIM Only

[PaulThePonderer]

I bought my handset outright and went for an O2 SIM only monthly contract ages ago. Time for me to change tarriff but I'm a little puzzled. 

Am I correct in thinking  ...

if I "upgrade", essentially it's a silent system change for O2 so I don't see anything much apart from a change in the billed amount; contract rolls over seemlessly, number stays the same etc.

if I take out a new SIM only deal, there's an overlap in contract periods (I end up paying twice), new SIM has to be installed, number ported over to the new SIM etc.

[jonsie]

@PaulThePonderer 

Go to My O2

Select 'upgrade now'

Scroll down to choose sim only

Then click on the tab for sim only

See image below

[PaulThePonderer]

Ahhhh. Now I see.

I could have sworn when I looked early April, there was a big difference in the options available between upgrade and SIM only via the shop.

Nevermind, problem solved, and upgrade ordered!

Thanks.

[jonsie]

Excellent @PaulThePonderer 

[Cleoriff]

Good news