7 sourced reports, with what to check before you buy. Each one links to the page it was reported on.
Costly or dangerous
Galaxy A35 5G green line appears on display, even after screen replacement
On Samsung's own community forum, an owner reports the screen died within a month, was replaced under warranty, then a green line appeared on the new panel without any impact, and it became permanent.
What to check. The green-line defect can recur even on a warranty-replaced screen; if it appears, push Samsung for a durable fix, as it is a known recurring display fault.
Galaxy A35 5G screen turns green and phone overheats after update (TR market)
A Turkish owner reports the screen suddenly went green with black patches right after a software update, and the phone started overheating; forum replies link it to the update rather than impact.
What to check. A green screen appearing right after an update may be software-related; try a factory reset or rollback before assuming panel hardware failure, but overheating alongside it points to a deeper issue.
Galaxy A35 5G stuck in restart loop, will not boot (TR market)
A Turkish owner on Technopat reports the A35 repeatedly power-cycling and stuck on the Samsung logo; forum advice points to reflashing stock ROM via Odin (model SM-A356E), implying a firmware-level fault.
What to check. If the phone bootloops, a stock-ROM reflash may be the only fix; this is not a user-serviceable repair for most buyers and may require service.
Galaxy A35 5G battery drains fast after ~3 months (TR market)
A Turkish owner reports the battery started draining very fast (~1% per minute) after the third month, and two service visits did not fix it, with Samsung Türkiye responding but not resolving.
What to check. If buying, plan for battery degradation within the first year; warranty service may not resolve it, so keep receipts and push for a replacement rather than a repair.
Galaxy A35 5G overheats during basic use, hurting battery life
A Best Buy reviewer reports heating during basic use and during setup, with a 25% battery drop from overheating; another review on the same page says 'It often overheats when charging, when working hard, when the air is hot or when I'm using it as a wifi hotspot.'
What to check. Expect the phone to run warm under load and while charging; if you use it as a hotspot or game, plan for heat and faster drain.
Galaxy A35 5G screen flickering with green flashes (AMOLED)
A UK repair guide lists flickering/green flashes as a known A35 symptom, distinguishing software causes (brightness/refresh-rate drivers) from hardware faults (loose flex cable or OLED panel damage).
What to check. If the screen flickers green at low brightness, first try software fixes (disable adaptive brightness, set 60Hz); persistent flickering usually means panel hardware damage requiring replacement.
Galaxy A35 5G battery capacity weak and phone warms under heavy use (EU)
A German-language review on Samsung's Danish page (originally posted on Samsung Germany) notes the battery capacity could be better and the phone warms quickly under intensive use.
What to check. EU owners also report modest battery capacity and warmth under load; expect to charge daily with moderate use.
These reports come from the pages linked under each item: owner forums, repair guides and workshops. They are not a diagnosis of any one unit, and a careful check of the one you are buying still applies.
Text from the Kriko Smartphones catalog, version 0.1.1, under the CC-BY-SA-4.0 license.