Effective in preventing co frequency interference for stable WiFi transfer. Modify the access point. FDD LTE: B2 B3 B4 B5 B7 B8 B12 B13 B17 B25 B26 B66;. TDD LTE: B41; WCDMA: B2 B4 B5 B8; GSM: 850, 900, 1800, 1900.
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