Huawei B882 Mode D'emploi page 11

 Radio signals can interfere with the telephone call connection and quality. To
eliminate the risk of possible interference, place the telephone at least 1 meter
away from the Turbo Hub.
 The 4G LTE Turbo Hub voice does not support:
Fax service

 Internet dial-up service
 Credit card machines
 Home security systems
 Medical alert systems
 Rotary or pulse-dialing telephones
 Voice or data service in the event of a power outage
 Receiving collect calls
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