Sony is expected to unveil two new smartphones, alongside other gadgets at the MWC 2016 event. Reuters/Yuya Shino

The Sony Xperia Z3+ smartphone -- and the Xperia Z4, which is targeted for the Japanese market -- are both powered by a revised edition of Snapdragon 810 chipset. But right from the start of this year, that chipset has been known for thermal heating issues. In fact, recent reports state that the new Xperia Z3+ and Z4 models are also suffering from overheating problems.

According to Phone Arena, the Japanese tech giant is aware of the issue caused because of the controversial chipset. In order to fix the issue, Sony has promised to release a software update by this summer. Until then, owners of Xperia Z4 and Xperia Z3+ are advised by Sony to turn off their handset several times a day and frequently back up important data.

Sony recommends switching off the handset while the device is kept for charging. Those users who are unsatisfied with the new Z4 and Z3+ flagships can ask a Sony service center for further assistance. Phone Arena adds that those who have already experienced heating issues on the Xperia Z3+ claim that the device tends to heat up while playing games, watching HD videos on Netflix, or recording a video.

The Xperia Z4 was launched in Japan on Wednesday. According to Xperia Blog, people who have purchased the Xperia Z4 handsets have already started complaining about heating issues. Some Japanese retail outlets are cautioning the buyers about heating problems associated with the chipset.

Even though the Snapdragon 810 chipset has been known for heating issues, flagships like LG G Flex 2 and Xiaomi Mi Note Pro powered with the same processor were released earlier this year. The Snapdragon 810 chipset is also available inside the HTC One M9.

However, since the chip has been in the news for heating problems, Samsung decided to release the Galaxy S6 flagship with its home-baked Exynos chip. The LG G4 that was unveiled recently does not feature the notorious chipset, but is powered by the Snapdragon 808 chipset.