Earlier this month, Apple released the iOS 15.5 Beta 4 update. Although it is still mentioned in the update instructions, it only mentions fixing bugs and optimizing the system. According to feedback from some domestic and foreign users, after upgrading to this version, the signal of the iPhone, especially the dual-SIM model, is optimized, the current is cut off and the network is unstable. Noticeably improved. After further digging, some netizens pointed out that at least for the iPhone 13, after Beta 3, the baseband firmware version was upgraded from 1.59.03 to 1.61.00, and the signal improvement may be related to this. Although the iPhone signal is not good, especially when the dual card is enabled, many people have come to understand it, but a little improvement can be said to be a pleasant surprise. It is reported that the iOS 15.5 Beta4 version update package size is about 500MB, and the firmware number is 19F5070b. In addition, at the WWDC conference in June, Apple will launch the iOS 16 system. It is said that the official version of iOS 15.5 may be the end of iOS 15, and it may be the “retirement” of the iPhone 6s/6s Plus/SE 2. &r.
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