Wi-Fi on a Galaxy A35 is usually a router or setting matter, and the A35's own limits explain some complaints: it supports Wi-Fi 6 rather than the Wi-Fi 6E or 7 of the flagships, so a tri-band router that puts 6 GHz on its best name leaves the A35 on the older bands. If the phone connects and drops, forget the network and rejoin, turn off Intelligent Wi-Fi's switch to mobile data, and make the router's 5 GHz security WPA2/WPA3 mixed. After One UI 8.5, owners of Galaxy phones describe connectivity drops, so install the newest patch. If every network fails in Safe mode, the phone needs a check.
Differential
Likely causes of “Samsung Galaxy A35 5G will not connect to Wi-Fi or keeps disconnecting”, and how to tell them apart
- 1
A router that favors 6 GHz
What separates it The A35 joins slowly or only on 2.4 GHz
How to confirm Use the 5 GHz band with a separate name
- 2
Intelligent Wi-Fi
What separates it Wi-Fi drops while you stay in the room
How to confirm Turn off Switch to mobile data
- 3
A stale saved network
What separates it Other devices join and the A35 does not
How to confirm Forget and rejoin
- 4
WPA3-only security
What separates it Authentication problem
How to confirm Set WPA2/WPA3 mixed
- 5
A crowded channel
What separates it Slow at certain hours
How to confirm Change the router channel
Before you touch a setting
Record this first — changing settings destroys the evidence
- The router model and the band
- The message on screen
- Whether other devices join
- The One UI version
Try in this order
0 of 6 completedRestart the phone and the router
ReversibleSwitch the router off for two minutes and restart the A35, then wait for the router lights to settle before rejoining the network.
Forget the network and join again
ReversibleSettings, Connections, Wi-Fi, tap the gear beside the network, choose Forget, and join again with the password typed fresh.
Turn off Intelligent Wi-Fi's mobile data switch
ReversibleIn the Wi-Fi screen open the three-dot menu, then Intelligent Wi-Fi, and switch off Switch to mobile data so the phone stops abandoning a working link.
Put the router on WPA2/WPA3 mixed
ReversibleIn the router's admin page set the 5 GHz security to mixed WPA2/WPA3; some routers' WPA3-only mode leaves a Wi-Fi 6 phone with an authentication problem.
Give the 5 GHz band its own name
ReversibleIf the router merges bands under one name, separate them and join the 5 GHz name, since the A35 cannot use the 6 GHz band that a tri-band router prefers.
Reset network settings last
Reset / data riskSettings, General management, Reset, Reset network settings clears a corrupted profile but also forgets Wi-Fi and Bluetooth pairings.
Model-specific
What is true of this model and not of its siblings
- The 6 GHz point
- The Galaxy A35 has Wi-Fi 6, not 6E; a router that offers 6 GHz does not change what the A35 can reach, and a router that steers devices onto 6 GHz can leave it on the slowest band.
- The One UI 8.5 context
- Galaxy owners describe connectivity drops after One UI 8.5, so a drop that began with the update is worth reporting after the router checks.
Stop boundary
When this stops being a self-service repair
- !If no network works in Safe mode, book a check
- !If one network fails, ask the router maker
- !If Wi-Fi will not switch on, restart then book service
Evidence ledger
Sources behind this answer
Samsung's Wi-Fi checklist.
A trade-press list of A35 problems and fixes.
Battery, charging, chip, storage and microSD slot of the Galaxy A35 5G.
Exact questions
Common questions
Why is my A35 slower on Wi-Fi than my newer phone?+
The A35 uses Wi-Fi 6 on 2.4 and 5 GHz, so a newer phone on 6 GHz can be faster on the same router.
Should I put the router on WPA3 only?+
Mixed WPA2/WPA3 is safer for older phones.
What if every Wi-Fi network fails?+
Test in Safe mode and after a network reset; if it still fails, book a Samsung check.