SAO PAULO--Brazil's mobile-phone subscriptions rose in December at a faster pace than the previous month, according to figures released Friday by telecommunications regulator Anatel.

Total mobile-phone users in Brazil increased to 261.76 million in December, up 0.67% from November, Anatel said. A total of 1.72 million new subscribers were signed up in December, up from 745,000 new subscriptions seen in November. In November, the number of mobile-phone users grew 0.28%.

In the full year of 2012, mobile-phone subscriptions increased 8% versus the year-ago period, with 19.54 million new subscriptions.

Telefonica Brasil SA (VIV, VIVT4.BR), also known as Vivo, part of Spain's Telefonica SA (TEF, TEF.MC), posted a market share of 29.08% in December, down from its 29.22% market share in November, but it still remains the country's largest operator overall.

TIM Participacoes S/A (TSU, TIMP3.BR) was second with 26.87% in December, up from 26.74% in the previous month. TIM is the local unit of Telecom Italia SpA (TI, TIT.MI).

Claro, the local unit of Mexico's America Movil SAB de CV (AMX, AMOV, AMX.MX), gained in market share, ranking third with a 24.92% share compared with 24.75% in November.

Local telecommunications company Oi SA (OIBR, OIBR4.BR) remained in fourth place with a 18.81% share, down from 18.98% in November.

Write to Rogerio Jelmayer at rogerio.jelmayer@dowjones.com.

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