Model support reference; unknowns explicitly noted ↗
Support commitment · Verified OS versionwww.kyocera.co.jp · Last verified 2026-10-30
Model/SKU-specific evidence only; release month references are not fabricated first worldwide retail dates.
Security support ends
2023-09
Official
- OS support ends
- No separate date specified
- Last verified
- 2026-10-30
- Region
- Japan / exact Kyocera model edition
No separate final major version release date is specified. Security support ends separately.
Support commitment
Kyocera KC-T304 · Support commitment
- Major OS upgrades
- Unknown
- OS support (years)
- Not separately specified
- Security support (years)
- Not separately specified
- Original OS version
- 11
- Verified OS version
- 12
- Last expected major version
- Unknown
- Update frequency
- Irregular
- Policy verified
- 2026-10-30
No separate final major version release date is specified. Security support ends separately.
Notes
Launch/announcement or regional availability time reference: 2021. Source: https://www.gsmchoice.com/en/catalogue/kyocera/kct304/. Manufacturer model-specific AER table extended security maintenance(ESMR) end month, not calculated estimate. NormalSMR and extendedESMR may differ; end uses ESMR. Only released Android version used as current; future scheduled date not invented Android major. Manufacturer cadence every two months; stored irregular because UI lacks bimonthly option, never biannual.
Sources
Sources substantiate only the indicated claims; missing values cannot be inferred from them.
Kyocera KC-T304 – original operating system ↗
Releasedwww.gsmchoice.com · Last verified 2026-10-30
Model/SKU-specific evidence only; release month references are not fabricated first worldwide retail dates.