Say it fast. It'll catch on.
Well, I predict two things will happen: 1) Orange will play a massive game of thumb wars with the two companies' billing systems until they magically 'fit together', never mind the massive struggles for CS staff and customers alike over that time.
Then, they'll dump all the (brilliant) remaining UK CS staff from T-M and outsource to hapless Indian callcentres which I can't understand or even get a sensible answer out of (yes, I've also been an H3G customer within the past 18 months). URGH. NO.
The saddest thing is that I've been a customer of theirs for a long time for the excellent customer service, the UK call centre staff and the market-leading data and call tariffs. However, in the past few months whenever I've rung 150 I've ended up speaking to someone in the Phillipines (or some other bizarre country like that - very worrying) and they won't let me move to the newer Flext tariff and keep my accrued loyalty discounts. Smacks of a loss of interest in customer base.
What finally confirmed it for me was when they superceded their WinMo handset range with their shiny Android exclusives, and didn't even bother to release the Touch Pro 2 (Voda have been offering it for a while to business customers and I covet it greatly).
TMUK is dead, long live TMUK. Hello T-M-Orange! (more like Hello goodbye, I must be going)