Following a call for tender issued in 2022, CERN has granted a contract to Swisscom^[1] for the provision of mobile telephony services starting in July 2023.

As this means that there is no change in our service provider, your mobile number (+4175411XXXX) remains unchanged and there is no need to replace your SIM card.
Orange continues to provide outdoor coverage in France.

While the service providers have not changed, the subscription fees have been reduced and we are introducing a new “Europe” subscription^[2] for people who travel frequently for professional reasons to countries in Europe other than Italy, Germany, Austria and the Host States.

To enable the necessary changes to be made for the implementation of the new contract, it will not be possible to cancel or modify phone subscriptions from 26 June to 3 July. Modifications and cancellations will be processed on 3 and 4 July. New subscriptions can still be requested at any time.

Please remember, when using a CERN mobile subscription, that you must comply with the mobile service terms and conditions. To minimise costs to CERN, you should use the CERNPhone application when calling outside Switzerland and the neighbouring countries rather than making voice calls with your mobile phone.

Please be aware that Swisscom’s cockpit application does not show the negotiated tariffs for CERN’s contract. The standard Swisscom price of 0.3 CHF/MB is shown for mobile data in Europe, while the real tariff is much lower.

For further details, please see the mobile service documentation.

^[1] Under the terms of the contract, our mobile infrastructure has been upgraded to add 5G and LoRa services in the underground areas and experimental facilities.

^[2] This subscription is likely to be cost-effective for people who use, on average, more than 2 GB/month when roaming in Europe. Full details of the subscriptions can be found here. Subscription modifications can be made via the Mobile Subscription Management EDH form.