Bolivia

Basics
The country of Bolivia has three network providers, no MVNOs yet: 2G and 3G is on 850 and 1900 MHz with variable coverage. 4G/LTE started in 2013/4/5 on all three providers: Entel uses 700 MHz, Tigo 700 and 1700 MHz (AWS) and Viva 1700 MHz only. In the meantime LTE is given out by all providers to prepaid customers without surcharges.
 * Entel (state-owned)
 * Tigo (by Millicom)
 * Viva (by Nuevatel)

Coverage and speeds can be very different according to location. Generally, they are a bit lower then in neighboring countries, but operators invest heavily to catch up.

You are required to register your SIM card in Bolivia. Therefore it's recommended doing the initial purchase and registration of the SIM card in a store of the operator, not forgetting to take along your passport.

Entel
Entel for Empresa Nacional de Telecomunicaciones is the state-owned incumbent provider in Bolivia. It's still the market leader with a share of 44% of national customers in 2015. It provides the best coverage even in remote areas. It started with 4G/LTE on 700 MHz in 2014 in the cities of La Paz, El Alto, Santa Cruz and Cochabamba. Their 4G footprint is expanded gradually to other departmental capital cities and larger cities.

Tigo
Tigo run by internatl. Millicom Group is the 2nd provider in Bolivia with a share of 29%. It was the first to employ 4G/LTE in 2013 which has spread to at least one city covered in each of Bolivia’s eleven departments.

Viva
Viva is run by Nuevatel PCS. It's the smallest of the three providers with a 27% share but the only who gained customers by its very low rates. Where it has coverage, it sells data at the lowest prices. It was the last to start 4G/LTE in summer 2015 in the La Paz area.