# Upgrade iodéOS from v2.15 to 4.9

**URL:** <https://community.iode.tech/t/upgrade-iodeos-from-v2-15-to-4-9/2295>\
**Category:** System and Apps\
**Tags:** SamsungS9\
**Created:** [4 February 2024 14:41 UTC](https://community.iode.tech/t/upgrade-iodeos-from-v2-15-to-4-9/2295 "2024-02-04T14:41:33Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jaw](https://community.iode.tech/user_avatar/community.iode.tech/jaw/32/895_2.png) [@jaw](https://community.iode.tech/u/jaw)\
**Post date:** [4 February 2024 14:41 UTC](https://community.iode.tech/t/upgrade-iodeos-from-v2-15-to-4-9/2295/1 "2024-02-04T14:41:34Z")

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Hello everyone,  
I’ve just checked the phone from my mother in law. She runs iodeOS for years.  
All of the OTA Updates went smoothly.  
Today I saw, that she is not receiving any updates since September 2023.  
Looking at the github releases page, I see that there is version 4.9 available.

Before doing a quick job through flashing v4.9 through recovery  
I’d like to ask, what is the recommended way to upgrade from 2.15 to 4.9?  
a.)  
Backup all Apps + data (NeoBackup or migrate-NG), reformat data and system, flash v4.9, reinstall all apps  
or  
b.)  
is there a seamless way that allows to upgrade to v4.9 directly?

Cheers