Hi all,
I just updated my fairphone 2 to 1.5.1 standard OS. My next step was to install the Open OS. However, I got the following error:
âCanât install this package (Tue Jun 14 15:55:46 CEST 2016) over newer build (Wed Jun 29 1:54:03 SGT 2016).
E:Error in /cache/fp_update.zip_
(Status 7)â
Do I simply have to wait until the latest open OS is released and if so, how long will that take? In the mean time I suppose I could root OS 1.5.1.
Thanks in advance
Which *.zip file did you download? Here youâll find the latest build. IMHO it should work with the first linked zip file (under OTA Build switcher). Please be aware that when switching to FP Open OS all your data will be deleted, so make sure to backup your data beforehand. 
Yes, I used âfp2-sibon-16.06.0-ota_from_gms-userdebug.zipâ (just double-checked to be sure).
Iâm also fully aware of the consequences of flashing a new OS
Well, I am not happy to hear that. 
But alternatively you could try installing via fastboot (see same link above for the appropriate zip file). Do you know how to do that? (If not, see Method 2 in the Installation Guide or else this helpful wiki post.)
Yes, please wait, so you donât have to downgrade.
16.06 = 1.4.2
The last two FP Open OS versions were released 3-4 days after the corresponding FP OS releases.
I guess you have to wait for Open OS 16.07.0, which presumably is going to be released soon. Open OS 16.06.0 is based on 1.4.2 and thatâs why you receive the error message.
In the past, the corresponding Open OS version has been released a couple of days after the Fairphone OS, so it should not take them long anymore (hopefully )
EDIT: @paulakreuzer was faster, sorry for a duplicate answer 
Alright, thanks for the help, Juli_R. I tried the fastboot method and it worked! I subconsciously tried to avoid using fastboot because I know from past experience itâs a lot more cumbersome, but your post made me try it anyway.
And thanks for the info on official OS vs. Open source OS, guys. I may have a lower firmware version now, but Iâm just glad to be rid of all the google junk and to have a bit more control over my cellphone.
Now back to reinstalling some apps on my squeaky clean phone
Want to change to Fairphone Open OS but updated to 1.5.1. How can I downgrade to previous version? Want to use my phone from now on (not waiting for Open OS 16.07.).
Thanks in advance.
Nailix
I moved your post here. If you read the posts above youâll see that besides not being recommended itâs also not that easy to switch to Open OS if itâs a downgrade. So better wait for the next Open OS.
PS: @M_Dammer, I moved your post here too.
I want to move from stock FP 1.5.1 to the latest open source version 16.06 and I get the error above. Is there any way to bypass this version check as it is not an update but will delete anything anyway ? Or a version 16.07 that is actually up to date ?
The last two FP Open OS versions were released 3-4 days after the corresponding FP OS releases.
The 1.5.1 version was released 16 days ago and no sign of an upgrade of the Open OS version. I cannot understand this delay. And I cannot understand any reason why the Open version is always released after the closed one. With the build tools being pretty much the same I would expect a simultaneous release of both versions.
Any news on a new version realese of FP Open OS?
Ok, thanks.
Iâve checked. Iâm stuck in the ânot that easy to switch to Open OS if itâs a downgradeâ.
If I click, I get fb2-sibon-16.07.0-ota-userdebug.zip
Ouh, yes, thatâs what youâre supposed to get.
The first link (the one for switching from GMS - the âOTA Build switcherâ) should be:
http://storage.googleapis.com/fairphone-updates/fp2-sibon-16.07.0-ota_from_gms-userdebug.zip (it doesnât show up properly in the post preview - probably a discourse bug)
The fastboot image is here.
Iâd personally wait for the release notes before installingâŠ
Hej! Same problem here. Just bought the phone and did a hasty update to 1.51.
Donât want to wait weeks until I use the phone.
The 16.07 Open Version is not available under the link. A download only has 127 Bytes - So just a dummy created for the new version :(.
A call with the fairphone support informed me, that the update 16.07 should be available this week.
So, I wait and hope the information is correct!
If not, Iâll try the fastboot.
Best regards,
David