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Joe - It is normal for the Vtech DS6621 to show "NO LINE" if there's no active land line connected to it. Your system will still work for cell calls as long as your cellphone is paired via Bluetooth. If you have trouble pairing your cellphone, please contact us at 1-800-595-9511. We are open from Mondays to Fridays, 9:00 AM to 5:00 PM. Thank you!
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