User Guide

11
Statement of Third-party Applications
During the installation process of some third-party
applications, the issues of repeated restart or abnormal use
of software might be caused by incompatibility of the third-
party applications, rather than the phone itself.
Please download your software upgrade packages from the
reliable official website.
The installation of a third-party ROM or non-official
operating system might bring safety risks and security
threats. Nubia Technology Co., Ltd. shall not be liable for
these risks and threats caused by upgrade of the operating
system.
FCC Hearing-Ai d Compatibility (HAC)
Your phone is compliant with the FCC Hearing Aid Compatibility
requirements.
The FCC has adopted HAC rules for digital wireless phones.
These rules require certain phones to be tested and rated under
the American National Standard Institute (ANSI) C63.19-2011
hearing aid compatibility standards. The ANSI standard for
hearing aid compatibility contains two types of ratings:
• M-Ratings: Rating for less radio frequency interference to
enable acoustic coupling with hearing aids.
• T-Ratings: Rating for inductive coupling with hearing aids in
telecoil mode.
Not all phones have been rated. A phone is considered hearing
aid compatible under FCC rules if it is rated M3 or M4 for
acoustic coupling and T3 or T4 for inductive coupling. These
ratings are given on a scale from one to four, where four is the
most compatible.