The Samsung S21 series currently includes the S21, S21+, and S21 Ultra models, powered by the Qualcomm Snapdragon 888 Mobile Platform. These handsets support 5G network connectivity. In this article, we review Celona onboarding and network performance of the Samsung S21 5G phone.

About the Samsung S21

Device website: link

Model Name: Galaxy S21 5G

Model number: SM-G991U1

Android version: 12

Baseband version: G991U1UES4BULE

Kernel version: 5.4.86 (Thu 23 Dec 09:41:29 KST 2021)

Onboarding the Samsung S21 to a Celona network

Activate a SIM in the Celona Orchestrator web interface and install the SIM to the Samsung S21. For a physical SIM (nano format), as you look at the front and top of the device, lay the SIM (notched corner towards you, leads facing up) into the tray and insert into the device.

For an eSIM onboarding, activate the eSIM in the Celona Orchestrator web interface.

Scan the corresponding QR code on the device via Settings > Connections > SIM card manager > + Add mobile plan.

In the following screenshot, we have both a physical SIM and eSIM installed on the same Samsung S21 device. Note that multiple SIMs will show multiple signal bars at the top right of the Android screen, and that one of the SIMs must be designated as a Primary SIM.

Add the celonadns APN to your device

With the SIM activate on the device, navigate to Settings > Connections > Mobile networks > Access Point Names. Add an Access Point, setting Name and APN. Leave all other fields in their default settings.

Save the new celonadns APN entry via the 3 dots on the upper right of the interface.

Verify that the celonadns entry appears in the list of Access Point Names.

Performance Testing

We performed a basic throughput and latency test via nperf.com with the Celona indoor AP in an office setting - about 50ft away, with cubicle obstructions.


To see Samsung S21 in action on a Celona network, enabled with critical apps that you care the most about, feel free to request a custom demo here.

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