Brazil has both modern technologies in the center-south portion, counting with LTE, 3G HSPA, DSL ISDB based Digital TV. Other areas of the country, particularly the North and Northeast regions, lack even basic analog PSTN telephone lines. This is a problem that the government is trying to solve by linking the liberation of new technologies such as WiMax and FTTH) only tied with compromises on extension of the service to less populated regions.

The Brazilian landline sector is fully open to competition and continues to attract operators. The bulk of the market is divided between four operators: Telefonica, America Movil, Oi (controlled by Brazilian investors and Portugal Telecom), and GVT. Telefonica operates through Telefonica Brasil, which has integrated its landline and mobile services under the brand name Vivo. The America Movil group in Brazil comprises long distance incumbent Embratel, mobile operator Claro, and cable TV provider Net Servicos. The group has started to integrate its landline and mobile services under the brand name Claro, previously used only for mobile services. Oi offers landline and mobile services under the Oi brand name. GVT is the country's most successful alternative network provider, offering landline services only.

"National:" extensive microwave radio relay system and a national satellite system with 64 earth stations.

Now, provide a numbered list of answers to these questions:

1. how many operators make up the bulk of the Brazilian landline sector?
2. what are they?
3. do the North and Northeast regions even have basic analog telephone?
4. who is trying to solve this problem?
5. who is Brazil's most successful alternative provider?
6. what do they offer?
7. is that the only service that they offer?
8. what technologies is the government trying to use?
9. is the landline sector in brazil open to competition?
10. under what name does Telefonica operate there?
11. is that a brand name?
12. for what?
13. who is America Movil group's mobile operator?
14. and who does their long distance?
15. do they also proved cable?
16. under what name?
1. Four
2. Telefonica, America Movil, Oi, and GVT.
3. No.
4. Government
5. GVT
6. Landline services.
7. Yes
8. WiMax and FTTH
9. Yes
10. Vivo
11. Yes
12. landline and mobile services
13. Claro
14. Embratel
15. Yes
16. Net Servicos