psyke83/android_device_huawei_u8160 — comment on commit f877fd8bb6fe312b3130b3dd7fc3ae123490bef4
File: system.prop line 21
By JoeyJiao:

Why everybody want to make it so long, some mk files indicate 30, some 60.
But I think if too long, in the Wifi Setting Activity, slow scan interval is very easy to loose connection.