Following a call for tenders issued in 2014, Swisscom will replace Sunrise as CERN’s mobile telephony operator from 24 June 2015. As of this date, CERN mobile telephone numbers will change from the +41 (0)76 487 xxxx format to the +41 (0)75 411 xxxx format and people with a CERN mobile telephony subscription will need to change their SIM card.

See the CERN Bulletin announcement for more information about SIM card replacements, the new mobile phone numbers, the key dates, contract conditions and changes to business cards.