Question S21, S21+, S21 Ultra

Search This thread

Badger50

Senior Moderator / Moderator Committee
Staff member

Best explanation I can give is due to the new forum design. At least for the foreseeable future, forums will be based on the "prefix" system without all the sub-forums that we have all been accustomed to. Of course, things can change, so we'll just have to wait and see my friend.
 

MICHEL75012

New member
Jul 12, 2007
3
0
France
Hello, can an expert helping me. I have a sm-G998U1 s21 ultra I paid via Rakuten site.
My concern is that I am not able to get 5G signal, only LTE, knowing that my operator is FREE with 5G in France. My SIM card has no problem because when I install it on an other mobile phone I receive the 5G.
Questions to the expert:
- Is this s21 ultra model compatible with 5G European bands and if yes, how can I customize my phone to receive 5G?
- Taking into account that this model is an US phone, do you think it's possible that I change the firmware via ODIN by replacing the current version SMG998U1 (US) by a SMG998B (European) and will this solve my 5G problem?
Or this is impossible even with different firmware because it is due to the mobile hardware, the antenna is different on US models.
Thank you for your help.
 
Last edited:
Buying a phone destined for another region comes with a price. Back and forth there are compatibility issues. G988B (Exynos) will not operate 5G in USA and G998U/G998U1 (Snapdragon) will not in Europe. This has to do with different bands and modem settings.

Whatever you do, do not try to flash firmware of a different type of phone! It will brick your phone.
 

MICHEL75012

New member
Jul 12, 2007
3
0
France
Thank you very much. The fault is due to the vendor Rakuten, it was mentioned that this model was compatible with french mobile providers. In fact it is true and not, it is working but only with 4G+ and not 5G!
I ordered this phone on Rakuten in order to get a better price but in the end this was really not a good idea!!!
 

lywyn

Senior Member
Jul 19, 2010
439
201
Thank you very much. The fault is due to the vendor Rakuten, it was mentioned that this model was compatible with french mobile providers. In fact it is true and not, it is working but only with 4G+ and not 5G!
I ordered this phone on Rakuten in order to get a better price but in the end this was really not a good idea!!!
4G and 5G spectrums are different in certain regions too. So a phone can support 4G but not 5G as the 4G spec may match the provider but the 5G may not be compatible.
 

Top Liked Posts