I'm in the same boat having taken an Orange iPhone account in Feb of last year after the sales droid assured me up and down that, should I leave the country, that there wouldn't be a termination fee. Posts here also suggested that this was correct.
I went to cancel my contract 2 weeks ago and...bam, 800 CHF said the dude at the Orange office. Mobile operators are mobsters on any continent and, forever more, I will buy an untethered phone and a pay as you go SIM.
However, we both may be in luck as though I don't want to leave with a debt hanging over me, I also absolutely refuse to pay an 800CHF extortion fee.
See
http://www1.orange.ch/en/support/bec...ustomer/expat/ and click on "useful tips" where you will find the following text;
"i am leaving Switzerland and need to cancel my subscription, how do I do it?
You're currently an Orange customer but getting ready for adventures outside Switzerland? No problem. You'll simply need to inform us (by calling Customer Care free on 0800 700 700) that you want to cancel your subscription and provide us with a document from your community confirming that you are leaving the country.
If you have been with us for less than 6 months or have benefited from a handset offer recently, you may have to pay a penalty fee."
We have legal insurance and, so, if they try to stick it to us tomorrow, I will just pursue it legally as a) I was lied to at the point of sale and b) their FAQ is ambiguous but also leads me to believe that I can cancel the contract after 6 months without penalty.
In contrast, Swisscom was a breeze and immediately changed to a pay as you go scheme for my husband's phone. Of course, their service sucked balls outside of Switzerland but...I guess you can't have it all.
I really hope there's a circle in Dante's hell for Mobile Operators. AT&T first into the fire. Never again will I trust these folks.
Best advice to those new to CH without an absolute certainty that they'll be around for more than a year - pay up front for the phone and get a pay as you go plan. Much less hassle.