Huawei Mobile WiFi 3s Quick Start Manual page 16

All RF parameters (for example, frequency range and output
power) are not accessible to the user, and cannot be changed
by the user.
For the most recent information about accessories and
software, please see the DoC (Declaration of Conformity) at
http://consumer.huawei.com/certification.
Please visit http://consumer.huawei.com/en/support/hotline for
recently updated hotline and email address in your country or
region.
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