Answer
Antel is considered very strong in terms of coverage: it has coverage above 98%. That doesn't mean the same quality in every apartment, but as a basic network it covers almost the entire country.
In Uruguay, home internet is linked to the state provider, so the choice usually starts not with comparing many companies but with a specific address. Even with good overall coverage, a house, building entrance, or apartment may have its own limitations regarding connection, equipment, and an active contract.
For living and remote work, it is important to consider not only the promised availability but also the actual stability of the connection indoors. Before moving in, it is useful to clarify whether there is an active line, in whose name the contract is registered, whether it can be transferred, and what backup is needed in case of a short outage.