This has been an extremely frustrating experience from the very first day.We activated Oister Home Internet (5G) on January 11, 2026, and the service has been completely unusable from day one. Despite following all recommendations, the connection does not work as advertised or promised during the sales process.We performed multiple speed and stability tests throughout the day. Results fluctuate heavily and, most critically, the upload speed dropped to 0 Mbps in the latest test. With 0 Mbps upload, the connection is effectively broken: no streaming, no work platforms, no online gaming, and even basic browsing fails.To rule out any user-side issues:The modem is placed directly at a window, literally against the glassDevices are in the same room or only one wall awayStill, phones and TV fail to connect or constantly disconnectAt this point, I am forced to use my iPhone’s 5G connection (Norlys) just to send emails and leave this review, because Oister’s home internet does not work at all.Support and communication are equally disappointing:There is no functional email contactIt is impossible to call support on a SundayThe sales representative promised to be a direct contact, but the email address provided does not even accept incoming messagesAs a result, we already lost one full day of service and one day of the 14-day withdrawal period, without having a working connection or proper support. This feels deeply unfair.We were also scheduled to move four mobile phone lines to Oister shortly, but after this experience, we have completely lost confidence.In short:The service does not work, does not match what is advertised, and the support structure is inadequate when problems arise. This has been, without exaggeration, the worst decision to switch provider.
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