On 11/02/2017 04:19 AM, Mohammed Elsir Osman Alebeid wrote:
some Android device such as Samsung, Huawei, Lenovo and part of HTC reject the provided time zone and display the time zone based on lookup table inside the handset.
Since only some Android devices do this, it could be because each manufacturer has changed the time zone code or data on its own. If so, I'm afraid you may need to contact each manufacturer. I am using a Google device running Android 8.0 Oreo. Its clock settings for "Home time zone" do not list Khartoum or Sudan as an option. For GMT+2:00 in Africa it lists only Windhoek, Cairo, and Harare. For GMT+3:00 in Africa it lists only Nairobi. So perhaps phones running new-enough Android, or Android unmodified from Google, do not have the problem. I notice that Joda Time, which is a popular time zone package used in older Java implementations, does not yet have the Sudan change of 2017c. I'll CC: this to the Joda Time maintainer on the off chance that it's related.
Below is an example from Lenovo P2.
The Lenovo screenshot says it is using "network-provided time zone", and that this is "GMT +03:00 East Africa Time". So it sounds like there is some problem in Lenovo's handling of the network-provided time zone, as "GMT +03:00" is the wrong rendering for your network's "timezone: GMT + 2 hours 0 minutes". However, all this is outside the scope of the tz database, as it is independent of the NITZ protocol used by cell phones for time zones, and this means the tz mailing list can't help you. So I'm afraid you may have to take it up with Samsung etc. Unfortunately this is not something the U.S. State Dept. is likely to help with. Perhaps you can contact the South Korean embassy in Khartoum, telephone (+249) (183) 580-031 / 2, and ask for their help, and similarly for the countries of the other manufacturers.