Exhibit 99.3

Unaudited pro forma condensed combined financial information

The unaudited pro forma condensed combined balance sheet information as of June 30, 2015 is based upon (i) the historical consolidated financial information of Frontier and (ii) the historical combined financial information of the VSTO, and has been prepared to reflect the Verizon Transaction based on the acquisition method of accounting. The unaudited pro forma condensed combined statement of operations information for the six months ended June 30, 2015 is based upon (i) the historical consolidated financial information of Frontier and (ii) the historical combined financial information of the VSTO, and has been prepared to reflect the Verizon Transaction based on the acquisition method of accounting. The unaudited pro forma condensed combined statement of operations information for the year ended December 31, 2014 includes the results of the Connecticut Operations for the period of January 1, 2014 through October 24, 2014. The unaudited pro forma condensed combined statement of operations information for the year ended December 31, 2014 is based upon (i) the historical consolidated financial information of Frontier, (ii) the historical combined financial information of the VSTO and (iii) the historical combined financial information of the Connecticut Operations for the period of January 1, 2014 through October 24, 2014, and has been prepared to reflect the Verizon Transaction and the Connecticut Operations based on the acquisition method of accounting. The unaudited pro forma condensed combined financial information presents the combination of the historical financial statements of Frontier and the historical financial statements of the VSTO, adjusted to give effect to (1) the transfer of specified assets and liabilities from Verizon to the VSTO that are not included in the VSTO historical balance sheet as of June 30, 2015, and the retention of specified assets and liabilities by Verizon that are included in the VSTO historical balance sheet as of June 30, 2015, as more fully described in note 3(a) below, (2) the use of restricted cash, the Term Loan Facility and bridge financing to fund the cash payment to Verizon for the purchase price, as more fully described in note 3(b) below, (3) the payment by Frontier to Verizon of $10.54 billion in cash and assumed debt (excluding any potential working capital purchase price adjustment as set forth in the Verizon Purchase Agreement) as more fully described in note 3(c) below and (4) the consummation of the transactions contemplated by the Verizon Purchase Agreement, with Frontier considered the accounting acquirer, based on the assumptions and adjustments described in the accompanying notes to the unaudited pro forma condensed combined financial information. The historical financial information has been adjusted to give effect to events that are directly attributable to the Verizon Transaction and factually supportable and, in the case of the statement of operations information, that are expected to have a continuing impact.

On October 24, 2014, we acquired the wireline properties of AT&T in Connecticut by acquiring all of the issued and outstanding capital stock of Transferred AT&T Companies for a purchase price of $2.0 billion in cash, excluding adjustments for working capital, pursuant to the AT&T Purchase Agreement. Prior to the closing of the Connecticut Acquisition, (i) AT&T transferred to the Transferred AT&T Companies certain assets and caused the Transferred AT&T Companies to assume certain liabilities relating to the business to be acquired and (ii) the Transferred AT&T Companies transferred to AT&T certain assets, and AT&T assumed certain liabilities of the Transferred AT&T Companies, to be retained by AT&T following the closing. The Company financed the Connecticut Acquisition using the net proceeds of an offering of $1.55 billion aggregate principal amount of senior unsecured notes, borrowings of $350 million under a term loan credit agreement and cash on hand.

The unaudited pro forma condensed combined balance sheet information has been prepared as of June 30, 2015, and gives effect to the Verizon Transaction and other events described above as if they had occurred on that date. The unaudited pro forma condensed combined statement of operations information, which has been prepared for the six months ended June 30, 2015 and the year ended December 31, 2014, gives effect to the Verizon Transaction and other events described above as if they had occurred on January 1, 2014. The summary unaudited pro forma condensed combined statement of operations information for the year ended December 31, 2014 gives effect to the Connecticut Acquisition as if it had occurred on January 1, 2014.

The unaudited pro forma condensed combined financial information was prepared using, and should be read in conjunction with, (1) the audited combined financial statements of the VSTO for the year ended December 31, 2014, (2) the unaudited interim condensed combined financial statements of the VSTO as of and for the six

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months ended June 30, 2015, (3) the unaudited interim condensed combined financial statements of the Connecticut Operations for the nine months ended September 30, 2014, (4) the audited consolidated financial statements of Frontier for the year ended December 31, 2014, and (5) the unaudited interim condensed consolidated financial statements of Frontier as of and for the six months ended June 30, 2015.

The unaudited pro forma condensed combined financial information is presented for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved had the Verizon Transaction and other events described above been completed at the dates indicated above. In addition, the unaudited pro forma condensed combined financial information does not purport to project the future results of operations of Frontier after completion of the Verizon Transaction and the other events described above. In the opinion of Frontier’s management, all adjustments considered necessary for a fair presentation have been included.

The unaudited pro forma condensed combined financial information does not give effect to any potential cost savings or other operating efficiencies that could result from the Verizon Transaction, or from the Connecticut Acquisition for the period of January 1, 2014 through October 24, 2014. In addition, the fair value of the assets acquired and liabilities assumed are based upon estimates. The final purchase price allocation is dependent upon valuations and other studies that have not yet been completed. Accordingly, the purchase price allocation pro forma adjustments are preliminary and are subject to further adjustments as additional information becomes available and additional analyses are performed, and each further adjustment may be material. Such adjustments have been made solely for the purpose of providing unaudited pro forma condensed combined financial information.

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FRONTIER COMMUNICATIONS CORPORATION AND SUBSIDIARIES

UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET INFORMATION AS OF JUNE 30, 2015

See notes to unaudited pro forma condensed combined financial information.

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FRONTIER COMMUNICATIONS CORPORATION AND SUBSIDIARIES

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS INFORMATION FOR THE SIX MONTHS ENDED JUNE 30, 2015

See notes to unaudited pro forma condensed combined financial information.

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FRONTIER COMMUNICATIONS CORPORATION AND SUBSIDIARIES

UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS INFORMATION FOR THE YEAR ENDED DECEMBER 31, 2014

See notes to unaudited pro forma condensed combined financial information.

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Notes to unaudited pro forma condensed combined financial information

1. Description of the Verizon Transaction

On February 5, 2015, Frontier entered into an agreement with Verizon to acquire Verizon’s wireline operations that provide services to residential, commercial and wholesale customers in California, Florida and Texas for a purchase price of $10.54 billion in cash and assumed debt, excluding adjustments for working capital. As of the date of the announcement, these Verizon properties included 3.7 million voice connections, 2.2 million broadband connections, and 1.2 million FiOS^® video connections. The network being acquired is the product of substantial capital investments made by Verizon, with an estimated 54% of the residential households being enabled with FiOS^®. Subject to regulatory approvals, the Verizon Transaction is expected to close by March 31, 2016.

On October 24, 2014, pursuant to the AT&T Purchase Agreement, the Company acquired the wireline properties of AT&T in Connecticut for a purchase price of $2.0 billion in cash, excluding adjustments for working capital. Following the Connecticut Acquisition, Frontier now owns and operates the wireline business and fiber optic network servicing residential, commercial and wholesale customers in Connecticut. The Company also acquired the AT&T U-verse^® video and DISH^® satellite TV customers in Connecticut.

The unaudited pro forma condensed combined financial information was prepared for the purpose of developing the pro forma financial statements necessary to comply with the applicable disclosure and reporting requirements of the SEC. For purposes of the unaudited pro forma condensed combined financial information, the estimated aggregate transaction costs (other than debt incurrence fees in connection with the bridge financing, as set forth in note 3(b)), which are charged as an expense of Frontier as they are incurred, are expected to be approximately $26 million and include estimated costs associated primarily with investment banker advisory fees, legal fees, and regulatory and auditor services of Frontier. This balance is reflected as an accrual in the Pro Forma Adjustments column on the unaudited pro forma condensed combined balance sheet as of June 30, 2015. The combined company will also incur integration costs primarily related to information systems, network and process conversions (including hardware and software costs). Integration costs will be incurred in part in advance of the consummation of the Verizon Transaction, and are recorded based on the nature and timing of the specific action. For purposes of the unaudited pro forma condensed combined financial information, it was assumed that no amounts would be paid, payable or forgone by Verizon pursuant to orders or settlements issued or entered into in order to obtain governmental approvals from the Federal Communications Commission and in the States of California, Florida and Texas that will be required to complete the Verizon Transaction.

Frontier is considered the accounting acquirer for purposes of the preparation of the unaudited pro forma condensed combined financial information. This conclusion is based upon Frontier’s consideration of all relevant factors included in the accounting standard regarding business combinations, including the purchase of a newly formed legal entity to which Verizon will contribute Verizon California Inc., Verizon Florida LLC and GTE Southwest Inc. (doing business as Verizon Southwest) pursuant to the Verizon Purchase Agreement.

2. Basis of purchase price allocation

The estimated purchase price ($10.54 billion less $593 million in assumed debt) has been allocated to the tangible and intangible assets acquired and liabilities assumed on a preliminary basis as follows (dollars in millions):

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The allocation of the purchase price to assets and liabilities is preliminary. The final allocation of the purchase price will be based on the fair values of the assets acquired and liabilities assumed as of the date of the Verizon Transaction, as determined by third-party valuation for certain assets and liabilities. The valuation will be completed after the consummation of the Verizon Transaction. There can be no assurance that the actual allocation will not differ significantly from the preliminary allocation.

Frontier and Verizon have agreed to make a joint election under Section 338(h)(10) of the Internal Revenue Code, and comparable state and local tax code provisions.

3. Pro forma balance sheet adjustments:

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The pension and other postretirement employee benefits adjustments are based on amounts recorded by Verizon whereby the pension and OPEB obligations related to active employees only will be transferred to Frontier and pension obligations will be fully funded as of the closing date of the Verizon Transaction. An actuarial evaluation will be completed subsequent to the completion of the Verizon Transaction and may be different from that reflected in the unaudited pro forma condensed combined financial information. This difference may be material.

The pro forma adjustment to cash reflects the proceeds of the Term Loan and the bridge financing, excluding the related fees, and the use of $1,840 million in restricted cash.

The adjustment presented reflects the debt incurrence of $8,100 million in the aggregate; less assumed debt incurrence fees and commissions of approximately $185 million (of which $132 million has been incurred). Additionally, an adjustment was made for $53 million to reflect the acceleration of deferred financing costs related to the bridge financing.

(ii) This adjustment in the amount of $124 million eliminates the deferred tax assets of VSTO as of June 30, 2015.

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(iii) This adjustment in the amount of $238 million reflects the goodwill associated with the excess of the Verizon Transaction consideration issued over the preliminary estimated fair value of the underlying identifiable net tangible and intangible assets at June 30, 2015.

(iv) This adjustment in the amount of $2,410 million reflects the preliminary fair value of the identifiable intangible asset (customer list) which was estimated by Frontier’s management primarily based on the fair values assigned to similar assets in recently completed acquisitions (a market approach). A third party valuation firm will be utilized to help determine the final fair value after the Verizon Transaction is completed, but this determination has not yet begun. There can be no assurance that the actual fair value determination will not differ significantly from the preliminary fair value determination. For purposes of the preliminary fair value determination, the estimated useful life of the customer list asset was assumed to be ten years.

(v) This adjustment in the amount of $26 million records the estimated unpaid non-recurring costs for acquisition related transaction costs, primarily bankers, lawyers and consulting advisory fees.

(vi) This adjustment in the amount of $2,114 million eliminates the deferred tax liabilities of VSTO as of June 30, 2015.

(vii) This adjustment in the amount of $5,335 million eliminates the “as adjusted” net equity of VSTO ($5,309 million) and recognizes unpaid estimated transaction costs of $26 million as of June 30, 2015.

4. Pro forma statement of operations adjustments—VSTO:

The actual depreciation and amortization expense will be based on the final fair value attributed to the identifiable tangible and intangible assets based upon the results of the third-party valuation of the acquired assets. The depreciation and amortization rates may also change based on the results of this third-party valuation. There can be no assurance that the actual depreciation and amortization expense will not differ significantly from the pro forma adjustment presented.

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5. Pro forma statement of operations adjustments—Connecticut Operations:

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The actual depreciation and amortization expense will be based on the final fair value attributed to the identifiable tangible and intangible assets based upon the results of the third-party valuation of the acquired assets. The depreciation and amortization rates may also change based on the results of this third-party valuation. There can be no assurance that the actual depreciation and amortization expense will not differ significantly from the pro forma adjustment presented.

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