The OP said he/she wanted a “functional” VPN that supports IPv6 and is the cheapest (and said nothing more). Hmmm…
(Excuse me for digressing, but if what the OP wanted was something like privacy, then a free VPN is a bad choice.
Honestly, I don’t believe that free VPNs will protect your privacy. If you just need something like unblocking websites, you can use a free VPN. If you care about privacy, do the opposite—pay for a VPN).
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