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Andorra Telecom is the only network provider in this small country. The state owned company was formerly called Servei de Telecomunicacions d'Andorra (STA) a.k.a. Som. It has 2G on 900 and 1800 MHz and 3G/UMTS on 2100 MHz like in most of Europe. 4G/LTE is on 1800 MHz and 800 MHz, but not yet open for prepaid.
Their prepaid product is called Mobiland Clic! You can purchase a SIM card from the Andorra Telecom head office at Av. Merixell 112 in Andorra la Vella or its distributors. Mini-SIMs (2FF), micro-SIMs (3FF), and nano-SIMs (4FF) are available.
A SIM card costs a whopping € 60 including the same credit valid for 5 months. When credit is used up, card stays valid for another 8 months incoming only.
Top-ups can be done with vouchers for € 15, € 30 or € 60 valid for 2, 5 or 7 months respectively available in stores. Check credit by calling 178 for free.
There is no data without packages which have to be booked by sending a SMS. To check the remaining data credit, send a free empty SMS to 123.