4G network issue

[Achie1]

My name 4G network has become very slow after December security update. When I removed my sim card and put in another smartphone, everything is fine. When I use other sim card, the problem comes back. Only 4G faces this issue. 3G is fine.

Galaxy A7 2017

[ArcaneNova18]

u should probably go to Samsung support

[Achie1]

OK. I will doit. The problem is serious. Even the sim cards of my friends can't give me 4G on my mobile.

[prajjwal2]

it might be due to the sim.

[Achie1]

When I put the Sims in other smartphones. The 4G works fine.
The problem happened when I received a security update on Thursday night. After the reboot, the 4G appeared but I can't surf on internet. 3G works fine

[Samsung_specialist]

Hello there, in order to assist you further we recommend you visit the nearest Samsung Service center with the device to have it checked.
http://www.samsung.com/ae/support/servicelocation/

[Achie1]

Hi! I went to Samsung Service in my country. They say it's related to the update. I noticed also many Galaxy A7 2017 have this problem in my country (Ivory Coast). I also notice that the CSC of all these mobiles phones is : UNITED EMIRATES ARAB.
Please, in the next update, fix the modem problem for us.

[janushbadur]

that same problem to my a7 2017 also. please do anything help us.

[Achie1]

I received an OTA update and it fixed my 4G problem.

[a72017niy]

https://r2.community.samsung.com/t5/Galaxy-A/Galaxy-A7-2017-slow-4g-after-security-update-SOLVED/td-...