Small models (40, 42 or 44 mm) use 20 mm lug width. Large models (45, 46 or 47 mm) use 22 mm. Watch Ultra (47 mm) has 22 mm with Trail/Alpine quick-release mechanism.
Yes if both are 20 mm. Watch 4 40/42 mm and Watch 7 40/44 mm are both 20 mm. Watch 4 Classic 46 mm and Watch 6 Classic 47 mm are both 22 mm and interchangeable.
No — Tizen models (Watch 1 to Watch 3) cannot be upgraded to Wear OS. A hardware swap is required. Wear OS is only available from Watch 4 (2021).
Watch 1 to Watch Active 2 worked partly with iOS. From Watch 3 and Watch 4 only Android is officially supported — iOS pairing has not been available since Wear OS.
Watch 1 to Watch 4 use Samsung''s BoB magnetic charger (proprietary). Watch 5 and newer are Qi-compatible and also charge on universal Qi pads. Watch Ultra supports 10 W fast charging.
Guide & know-how
Galaxy Watch — bands, hydrogel films, charging cables and protective cases at RPD — the hub for every Samsung smartwatch generation. Watch 1 to Watch 3 = Tizen OS, Watch 4 and newer = Wear OS (Samsung + Google). Sizes 40/42/44/46 mm + Watch Ultra 47 mm. Watch 6 Classic brought the rotating bezel back. ECG sensor, blood pressure (in supported regions), body composition analysis, BoB charging until Watch 4 — Qi-compatible from Watch 5. Same-day dispatch from Basel for orders by 4 pm, free above CHF 15, payment on invoice (credit check required by Powerpay), 14-day return policy, 2-year Swiss warranty and "Best Price CH" guarantee.
Three generation tracks, two operating systems:
Watch 1 (2018) launched the line still on Tizen with rotating bezel. Watch Active 2 (2019) first ECG. Watch 3 (2020) SpO2 debut. Watch 4 (2021) switched to Wear OS with Google — full app store. Watch 5 Pro (2022) sapphire glass and titanium case. Watch 6 Classic (2023) brought back the rotating bezel (Watch 4 + 5 had touch bezel). Watch Ultra (2024) outdoor flagship with 47 mm titanium and 100 m water resistance.
Galaxy Watch bands trade on two standard lug widths:
For athletes silicone sport bands. Commuters Milanese magnetic. Business users leather bands. Outdoor enthusiasts Trail/Alpine bands (Watch Ultra). Swimmers Ocean band or nylon Trail. Sustainable options: recycled FKM and Cordura nylon bands available.
In Basel, Aarau and Olten we repair Galaxy Watch models — display glass, battery, charging coil, bezel (Watch Classic). Repairs are often cheaper than a refurbished replacement — typically CHF 100–200, 30–50% cheaper than a swap. Original charging cables and adapters in stock.
Shipped from our Basel warehouse, A-mail in 1–2 working days nationwide, express next working day or free pickup in Basel, Aarau or Olten via click & collect. 2-year Swiss warranty on every case, film, accessory and repair, CE/TÜV-certified parts, "Best Price CH" guarantee and payment on invoice (credit check required by Powerpay). We are happy to advise you in person in one of our stores — repairs, protection solutions and warranty handling from a single source.
