A VPN gets you past a block in seconds and gets your account closed at the first withdrawal. Why the terms forbid it, how detection works, and the cases where it is legal and pointless.
In similar words everywhere: the customer confirms that betting is legal where they are, that they are not using any means to conceal their location, and that the operator may void bets, withhold winnings and close the account if the account is used from a restricted territory. The clause is there because the licence requires it: a UK operator that knowingly takes bets from a country where it is unlicensed breaks its licence conditions.
Not usually by the VPN. Operators use IP databases that flag VPN and data-centre addresses, but the reliable signal is inconsistency: a registration address in one country, a card issued in another, a phone number from a third, and a document that matches none of the logins. The check runs at withdrawal, when a person looks at the account for the first time, which is why VPN accounts run for months and fail on the day the money is requested.
The winnings, under the terms, and often the deposit as well. No regulator will help: a complaint that starts with "I used a VPN to bet from a country the operator does not serve" ends there. In several countries there is also legal exposure: betting on unlicensed sites is an offence for the player in Turkey, Poland and a few others, and payments to such sites are blocked or reported in Norway and elsewhere.
On public wi-fi, for privacy, from a country the operator serves, with the VPN server in the same country: nothing in the terms objects, though some operators still block data-centre addresses and will ask you to switch it off. Travelling with an existing account is a different case: most operators allow temporary use from abroad where the local law permits, some do not, and a message to support before the trip settles it.
A licensed operator in your country, if one exists; our country pages list them. An international operator that accepts your country openly, which is what most of the Curaçao platforms do across Africa, Asia and Latin America. And, where neither exists, the honest conclusion that online betting is not available to you, rather than an account that will be closed when it matters.
Probably not at login, almost certainly at withdrawal, when the account is reviewed.
From a country the operator serves, usually yes; ask support before you travel.
It breaks the operator’s terms everywhere and the law in some countries.