Tip: stay away from Sunrise if you intend to buy an iPhone!
I bought an iPhone under a 1 year contract from Sunrise. After my contract ended, they still refused to remove the Simlock, saying that I have to wait for two years . They can only unlock it for special reason, e.g. if I were leaving the country, but even in that case, they would still require me to pay 300CHF to have them unlock my iPhone! I have read that they also do this even to customers who have bought the iPhone at full price without contract. I guess that means that all iPhones you buy from Sunrise are locked to Sunrise and their network for two years! My guess is that they probably buy the 2 years simlock version from Apple at the cheap price, and is selling these iPhones at Simlock-free rates.
By the way, Swisscom and Orange will unlock for free once your contract runs out, however, currently only Orange allows 1 year contract. And both companies really have simlock-free iPhones, that can be used in other network, or retain their high value, should you choose to resell ( e.g. to get new iPhone version . You can read more about Sunrise's terrible iPhone policy on the official Swiss consumer rights website (it is in German, so you may need google translator):
http://www.kassensturz.sf.tv/Nachric...h-Vertragsende
Sunrise, by the way, has also one of the slowest network speed on the average of all three carriers. And I can say, as a current Sunrise customer, their coverage in Switzerland is horrible . I am traveling in Switzerland a lot, and most of the time I have to resort to pre-downloading news article at home or even resort to my books, as it is useless to try to get internet connections going between large cities. And even in medium citites, I sometimes find that I have only 2G connection. Here is an article on the Swiss consumer rights webpage about the speed comparison between the carriers:
http://www.kassensturz.sf.tv/Nachric...chnellsten-ist
I like having a bargen as much as anyone, but I can see now that saving a few Franks in the beginning with Sunrise' iPhone, has costed me a lot more money in the end.
In short, think twice and read the contracts fine print several times (which is by the way in German), before signing the contract. You can also visit the Swiss consumer website and search for the carrier's name, to see more of what others say about them...