Network issue after Security patch update

[roshangawale]

I'm using an S21 FE, and after updating to the February 2026 security patch, I've been experiencing issues with both Wi-Fi and mobile network connectivity. Is anyone else facing the same problem? I'm on Jio, while other Jio SIMs in my household work fine on different phones.

[Nilesh_Shah]

Same in S22

[cs_member10]

Dear Samsung Member,

Greetings from Samsung Customer Support!

As per your concern, we would request you to kindly perform the following steps to resolve your issue.

● Kindly check the device in different locations/network coverage areas.

● Check Mobile Network: Settings> Connections>Mobile networks> Network mode> Select 5G/LTE/3G/2G (auto connect).

● Check Network Operator: Settings> Connections> Mobile networks> Network operators> Select automatically.

● Kindly check the same SIM card in another phone or another SIM card in the same phone to verify the issue.

● Kindly try to contact the service provider once.

● You can reset your device by following the steps from the below link.
https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-mobile-how-to-perform-a-factory-res...

If the issue persists, kindly report the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on send feedback> Choose Composer> Select error report> select the appropriate issue category> Type your query and send).

Warm Regards,
Samsung Customer Support

[roshangawale]

The issue is caused after security patch update for Feb 2026. All the suggested steps have been performed. I am sure resetting my device is definitely not going to help.

[roshangawale]

These are definitely not going to work. And I am not troubling myself resetting my phone. This issue is caused after February Security Patch so this issue is from Samsung's side. Neither I am visiting Samsung Service Centre, they are all pathetic technicians. Please do the needful and help me out at the earliest.

[RajathSR]

Yup, even me
horrible experience, the network goes into emergency call only and sometimes no network

all of this happened after feb patch

[roshangawale]

Exactly. The network feels static meaning if it goes into 4g, it remains in 4g only even if I move into strong network area. And in case of emergency call, it does not switch to 4g or 5g. Pathetic experience from samsung.