Hi SuzieQ, thanks for your interest on my problem!
The driver update didn’t work, because the GS290 allways changes ON/OFF.
After waiting for completely discharging of the battery I connect it to the charger, but it immediately returns to the described bootloop.
Now I will file a ticket at Gigaset. Hope they can give me a helpful hint.
Hi @HaMi,
I had the same symptoms today as you described with my GS290. It only ever displayed “Gigaset” in red and “Powered by android”. I fiddled around with it until nothing worked. Now the screen is black. Nothing works anymore. It can’t even be charged anymore. It’s dead. That was a short acquaintance.
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Hi ,
Did you tried to install a old version of twrp.
One time, i had difficulties with a phone.
And i resolved the problem by installing a precedent version of twrp.
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Hi, I tried anything but my GS290 never changes in a recovery, TWRP or Fastboot mode. Allways “Gigaset” in red and “Powered by android” is displayed only.
Also tried to get help from Gigaset service portal, but they answered that I should clarify it with my dealer.
Hed will not give me guarantee when I changed the software by myself.
So it seems that I have softbricked my GS290 with /e/ OS ?
Or is there an other hope for get running my phone with /e/ ? Help from /e/ foundation/service possible?
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I have been reading about SP Flash Tool as I have a MTK based MediaTek device. @SuzieQ did you already check out whether this might be an option for GS290?
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Hope to get some help from third party? No, I haven’t. I’m not asking either because the answers are predetermined. Changing the Orignal operating system has risks that the user is responsible for. I have written off this hardware.
It’s a tiresome topic that Gigaset does not provide an official stock Android 10 for the ut SP Flash Tool and the user has to make use of a capped ROM.
Try to press only Volumen up while reboot starts. Release when Gigaset Logo appears. Then you should geht the selection of recovery, fastboot and normal mode. Facing the same issue while tried the first flash…
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I’m looking for a complete ROM official Stock Android 9 and/or Android 10 firmware for Gigaset GS290.
So far I’ve not found an alternative to this download URL. Do you know an link that makes me happily?
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Hi,
dont want to paste the direct link due to compliance reason. Search in web for Rúben Carneiro villa phone repair. You can find all you need…
Another thing, iam happy with e and donated them.
If i would usw the other roms i would pay for it to…
BR
Detlef
@dherrman, thank you very, very much!
Not everything went as described by Rúben - but when the GS290 gave a first “sign of life” after the first “treatment”, I knew - my brand new GS290, which I thought was dead, was still breathing.
After several flash attempts my GS290 could understand fastboot again. With that, my Windows host machine also recognized an adb device in the Windows device manager. This was the decisive step to install Recovery and ROM in the further course. Dead believed live longer :-))))))
My GS290 is alive, running stock Android 10 and /e/OS ‘Q’ - but without IMEI’s and serial number. They are and remain gone.
In the meantime, I’ve recreated the situation umpteen times. Starting with the soft-brick, reviving with Ubuntu-Touch, VollaOS 9.0, LineageOS 17.1/18th, rooted and without rooting, with various IMEI changer apps, all of which fail to deliver what they promise.
Currently my GS290 is running rooted stock Android 10 2/2021, now I need a HOWTO to put both my IMEI and serial number back in.
Note: Recovering would belegal because I'm the rightful occupant of the GS290 and can read the original numbers on the original box sticker.
As Rúben wrote, try
- If You have no imeis after booting the phone just go to recovery and do a factory reset again, you will notice that nvdata will be wiped and your imeis will be back.
Well, your first post on my question was very helpful, this one was not. Well, I can read! If it were as simple as Rúben wrote, my problem would be solved - but it’s not. I’ve tried other proposed ‘solutions’ but to no avail because the software offered is not compatible with the current stock Android 10.
Did you find the Android 10 ROM for Gigaset GS 290 ?
I need to flash a bricked phone with new “Firmware” for then try to reinstall the /e/-OS.
I gues TWRP is for Windows user. I need for Fedora 33 Linux. The OmniROM doesn’t support GS290.
Thanks, I will have a look now 
I will just express here that I have no GS290 but nearly bought one, declining due to lack of factory ROM. I have continued my communications with Gigaset asking for a factory ROM.
Imho the above linked ROM might recover a device only from a semi-bricked state. Here is reported success in a particular circumstance. Stuck on fastboot flashing unlock(Now Black screen). Hence my word of caution to @anon21640558 
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Thanks @aibd for the clarification. I will ask the developer who worked on porting the GS290 and also wrote the draft for the documentation to check all these comments. Based on these inputs we will update the documentation.