*#*#372733#*#*
Source: https://community.phones.nokia.com/support/discussions/topics/7000011810
Plantronics Audio Tuning Wizard: 1-866-210-2157
Then dial 3, 1
Source: https://www.quora.com/How-can-I-make-a-test-phone-call
Last active
May 24, 2018 20:56
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