The first mobile devices from Samsung, boasting the "Unibody" designation, end up having some serious problems. In addition to the fact that Samsung had to deal with the production of aluminum chassis, it will probably have to deal with another problem in the future, which will definitely not please the users who were looking forward to the phone. Phones with an all-metal body are said to have problems with mobile signal quality. While u Galaxy S5 signal was at -82 dBm, for models Galaxy A3 a Galaxy A5 ranges at -92dBm and -93dBm and if there is another 10dBm drop the data connection will drop.
The author of the review, writing for Hi-tech.mail.ru, says that he managed to discover the difference in the signal by classically testing the phone with the help of the same SIM card and in the same place. Samsung thus inadvertently managed to create a similar problem that the phones initially suffered from iPhone 4, where the problem called Antennagate became famous. Apple then the team solved the problem by slightly changing the design of the phone in newer versions and completely solved the problem in iPhone 4s and iPhone 5. The first HTC One phones also initially suffered from the same problem, and it is possible that even here it will be only the first produced pieces, but not all models.
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*Source: Hi-tech.mail.ru
