The Galaxy Tab A9+ has dual-band Wi-Fi 5, which is fine for streaming and browsing but less forgiving of weak signal than the Wi-Fi 6 tablets above it, so when it drops off the network, shows no internet or crawls, the cause is usually distance, the router's band settings or a software glitch, and rarely a failed antenna. First find out whether the tablet or the network is at fault: join the same network with a phone, and try the tablet on a phone hotspot. If the tablet works on the hotspot, leave the tablet alone and look at the router.
The checks in more detail
If it fails on both, the tablet is the problem. Switch Airplane mode on and off, restart the tablet and, in Settings, Connections, Wi-Fi, tap the network and choose Forget, then join again with the password. The A9+ is a large 11 inch tablet in a plastic and metal body, and the antenna sits along the edges, so a thick folio case with a metal plate or a magnet can block signal; remove the case for a test. Because it supports both 2.4 GHz and 5 GHz, an A9+ that sees the network but stays slow may be on the weak 2.4 GHz band,
so check Settings, Connections, Wi-Fi, Advanced, and, if the router lets you, give the 5 GHz band its own name and join that one when you are in the same room. In the same advanced menu look for Switch to mobile data or Adaptive Wi-Fi style options on the 5G model, and turn off any setting that switches off Wi-Fi when the signal is poor if it keeps kicking you off. Turn off a VPN or ad-blocking DNS as a test, and check Settings, Connections, More connection settings, Private DNS. If a particular app fails while others work, the problem is that app and not Wi-Fi.
A tablet that has not been updated for months may have a known Wi-Fi bug fixed in a later patch, so open Settings, Software update and install what is waiting. Resetting network settings, found in Settings, General management, Reset, Reset Wi-Fi and Bluetooth settings, clears every saved network and often cures a stubborn fault, but you will need to enter your passwords again. Use Safe mode to see whether an app is interfering. If the tablet will not find any network after all of this, a repair at a Samsung service center or an exchange under warranty is the next step.
Differential
Likely causes of “Samsung Galaxy Tab A9+ will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
A weak 2.4 GHz connection
What separates it Connected but slow, pages stall
How to confirm Move closer and join the 5 GHz band
- 2
A case that blocks the antenna
What separates it Weak signal even near the router
How to confirm Remove the case and test
- 3
A stale saved network
What separates it The tablet will not rejoin
How to confirm Forget the network and add it again
- 4
A VPN or private DNS setting
What separates it No internet although Wi-Fi shows connected
How to confirm Turn them off as a test
- 5
An outdated software build
What separates it Wi-Fi faults after an update gap
How to confirm Install the waiting software update
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether a phone works on the same network
- Whether the tablet works on a hotspot
- The Wi-Fi band in use
- Whether a case is fitted
Try in this order
0 of 6 completedTest with a phone
ReversibleOn the same network.
Try a hotspot
ReversibleTo separate tablet from router.
Forget and rejoin
ReversibleThe network.
Remove the case
ReversibleAnd move closer.
Update the software
ReversibleIn Settings.
Reset Wi-Fi and Bluetooth settings
ReversibleAs a last step.
Model-specific
What is true of this model and not of its siblings
- Wi-Fi 5
- The A9+ has dual-band Wi-Fi 5, not Wi-Fi 6.
- Cases
- Metal plates and magnets can weaken the signal.
Stop boundary
When this stops being a self-service repair
- !If the tablet finds no network anywhere, contact Samsung with the model number
- !If only one app fails, contact that app's support
- !Back up before a reset
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Does the Tab A9+ support Wi-Fi 6?+
It has dual-band Wi-Fi 5.
Why is it slow on Wi-Fi?+
It may be on the 2.4 GHz band or too far from the router.
Can a case affect the signal?+
A metal plate or magnet can.
What does resetting network settings do?+
It clears saved networks and pairings.
Is it a hardware fault?+
Rarely; a hotspot test tells you.