As previously reported, Northland analyst Tim Savageaux upgraded Calix (CALX) to Outperform from Market Perform, stating that while its Q4 results missed expectations the company looks to have meaningfully addressed its operating expense and gross margin issues. While he expects slower growth as a ramp at Verizon (VZ) offsets weakness at CenturyLink (CTL), he estimates the company will turn from a loss to "solid profits" in FY18, Savageaux tells investors. He set a $9 price target on Calix shares.

Ribbon Communications (RRBN) announced plans for a major network modernization program with Verizon (VZ) to retire legacy TDM switching platforms and replace their function with modern cloud-based technologies. Verizon is leveraging Ribbon's portfolio of Voice Products including the vC20 Call Controller, G5 Line Access Gateway, G6 Universal Media Gateway, virtual and Cloud-native Session Border Controllers, and other products which allows for the consolidation and replacement of equipment with energy efficient, software-centric platforms while maintaining full feature functionality.

The company is speaking on its Q1 earnings conference call.

Wells Fargo lowered the firm's price target on Verizon to $40 from $44 and keeps an Equal Weight rating on the shares. The firm sees encouraging signs in Q1 - improvement in sub trends and limited churn from price-ups - offset by some softness in the business segment and prepaid. Wells would get more constructive when there's visibility on a sustainable improvement in sub trends.

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Calix shares are down $2.42, or 8%, to $27.12 in after-hours trading.

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Total wireless service revenue of $19.5 billion, a 3.3 percent increase year over year. Retail postpaid phone net losses of 68,000, and retail postpaid net additions of 253,000. Retail postpaid phone churn of 0.89 percent, and retail postpaid churn of 1.15 percent.

Total wireless service revenue growth of 2.0 percent to 3.5 percent. Adjusted EBITDA growth of 1.0 percent to 3.0 percent. Capital expenditures between $17.0 billion and $17.5 billion. Adjusted effective income tax rate1 in the range of 22.5 percent to 24.0 percent.

Reports Q1 revenue $33B, consensus $33.24B.