If your phone suddenly feels warmer after a software update, you’re not alone. AvNexo users across the UK — including London, Manchester, Birmingham, Leeds, and Edinburgh — regularly notice increased heat, faster battery drain, or even temperature warnings shortly after updating. This happens on both Android and iPhone, and despite what many people assume, it’s usually not a coincidence and not immediate hardware damage.
Software updates fundamentally change how your phone operates internally. Understanding what actually happens after an update explains why extra heat is so common.
Updates are not simple patches. They restructure large parts of the system:
All of this requires sustained processor activity, which naturally generates heat.
One of the biggest reasons for heat after updates is invisible background work.
After updating, phones begin:
This can continue for hours or days. AvNexo users in Nottingham and York reported phones warming up even while sitting idle overnight — a classic sign of background optimisation.
Not all apps are ready the moment a new OS version launches.
Some apps:
This creates constant CPU wake-ups and network usage.
UK users in London found that a single unoptimised app — often social media, banking, or navigation — was responsible for most post-update heating.
Updates often modify how phones interact with mobile networks, which directly affects heat generation.
After updates, phones may repeatedly scan for the best 5G signal. In cities like Birmingham or Sheffield, where 5G coverage varies street by street, this causes constant switching.
Phones on EE, Vodafone, O2, and Three all exhibit this behaviour when signal quality fluctuates.
Radio activity is one of the biggest hidden sources of heat.
Software updates refresh carrier settings in the background. During this phase, phones may reconnect to the network frequently, especially indoors or on trains.
Updates often reset battery calibration data.
Until the system relearns your usage patterns:
AvNexo users in Bristol noticed charging-related heat spikes for several days after updating, which gradually disappeared.
Updates frequently introduce:
Each addition adds a small load. On newer phones this is negligible, but on devices one or two years old, these small loads add up.
Some updates re-enable permissions:
Apps that were previously quiet may suddenly wake frequently, increasing heat.
AvNexo users in London Underground zones reported noticeable heating even during light use immediately after updates.
Based on UK user data:
If heat persists beyond a week during light use, further investigation is needed.
Software updates can expose existing hardware weaknesses:
If your phone overheats in cool environments with minimal use, the update may have revealed an underlying issue.
Software updates increase phone heat because they force the system to rebuild, re-optimise, recalibrate, and adapt — all of which requires sustained processing and network activity.
This behaviour is normal, temporary, and widely observed among UK users on EE, O2, Vodafone, and Three. Understanding this prevents unnecessary panic and poor decisions.
AvNexo users who recognise update-related heating for what it is — a transitional phase — avoid needless repairs, protect battery health, and let their devices stabilise properly.
Meta description: Software updates making your phone hotter? Learn the real reasons, UK user experiences, and what to do when updates increase phone heat.
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