Most, if not all routers, use the 2.4Ghz band.
You will need a Modem/Router that is ADSL2+ for Claro.
I bought from Cecomsa a TP-Link TD-8951ND because I got tired of Claro´s restricted software in their Modem/Routers.
The TD-8951ND works great for giving you access to all features of the unit,
BUT, the wi-fi is not that great in concrete houses. I ran an Ethernet cable to the other end of the house. From there I used an Amped 10000G high power wi-fi router to get full coverage at that side of the house. From there (2nd router), I ran a cable to my 2nd house and installed a Cisco router to have full wi-fi coverage in that (small) house.
I recently (Like NOW, currently in progress!) removed the 2nd router (Amped 10000G), replaced it with a D-Link 4 port switch, added a Linksys WRT1900ACS router at the site of the TP-Link router, but only after drilling a hole in the wall and placing the Linksys on the opposite side of the wall. It now gives me full in-house coverage as the location is a hallway that is open through to the other side of the house. I turned off the wi-fi in the TP-Link ADSL2+ modem/router.
The Amped 10000G is a high power 600 mW router and concrete walls defeat the range just like the rest of the routers.
None of the router´s wi-fi I have used/tried are much good getting through concrete walls and ceiling.
It´s a waste of time trying.
Location, location, location.....
extremely important in this country with concrete homes.
The cell phones switch routers automatically when going between houses.
Getting a ADSL2+ modem only would have been great!
Finding one in the D.R. - Impossible?
The Linksys WRT190ACS specs
Wi-Fi Technology: Dual-band Gigabit, 600+1300 Mbps
Network Standards:
802.11b
802.11a/g
802.11n
802.11ac
Wi-Fi Speed: AC1900 (N600 + AC1300)
Wi-Fi Bands: 2.4 GHz and 5 GHz (simultaneous dual band)
Great for VPN and possible to select which connections use the VPN and which do not.
The Linksys WRT1200AC is good also at about half the price of the WRT1900ACS (Check the specs).
Don