EXHIBIT 99.2

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION

The following tables set forth certain unaudited pro forma condensed consolidated financial information giving effect to CSG Systems International, Inc.’s (“CSG”) acquisition of Intec Telecom Systems Limited (formerly Intec Telecom Systems PLC, or “Intec”).

The unaudited pro forma condensed consolidated statements of income for the year ended December 31, 2009, and for the nine months ended September 30, 2010 (the “Pro Forma Income Statements”), give effect to CSG’s acquisition of Intec, as discussed in Note 3, as if such acquisition had occurred on January 1, 2009, combining the results of CSG for the year ended December 31, 2009 and the results of Intec for the year ended September 30, 2009 (Intec’s fiscal year end), and combining the results of CSG for the nine months ended September 30, 2010 and the results of Intec for the nine months ended June 30, 2010. The unaudited pro forma condensed consolidated balance sheet as of September 30, 2010 (the “Pro Forma Balance Sheet”) gives effect to the Intec acquisition as if it had occurred on September 30, 2010, combining CSG’s September 30, 2010 balance sheet with Intec’s June 30, 2010 balance sheet. The Pro Forma Income Statements and the Pro Forma Balance Sheet are hereafter collectively referred to as the “Pro Forma Financial Information”. The Pro Forma Financial Information is unaudited and does not purport to represent what CSG’s consolidated results of operations would have been if the Intec acquisition had occurred on January 1, 2009, or what those results will be for any future periods, or what CSG’s consolidated balance sheet would have been if the Intec acquisition had occurred on September 30, 2010.

The Pro Forma Financial Information is based upon the historical financial statements of CSG and Intec and certain adjustments which CSG believes are reasonable, to give effect of the Intec acquisition. The pro forma adjustments and Pro Forma Financial Information included herein were prepared using the acquisition method of accounting for the business combination. The pro forma adjustments are based on preliminary estimates and certain assumptions that CSG believes are reasonable under the circumstances. The purchase price allocation is considered preliminary and subject to change once CSG receives certain information it believes is necessary to finalize the acquisition accounting, as noted in Note 3 to the Pro Forma Financial Information.

The Pro Forma Financial Information has been compiled from the following sources with the following unaudited adjustments:

The Pro Forma Financial Information should be read in conjunction with:

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CSG SYSTEMS INTERNATIONAL, INC.

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME

YEAR ENDED DECEMBER 31, 2009

(In thousands, except per share amounts)

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CSG SYSTEMS INTERNATIONAL, INC.

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF INCOME

NINE MONTHS ENDED SEPTEMBER 30, 2010

(In thousands, except per share amounts)

See notes to pro forma condensed consolidated financial information

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CSG SYSTEMS INTERNATIONAL, INC.

UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET

SEPTEMBER 30, 2010

(In thousands)

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CSG SYSTEMS INTERNATIONAL, INC.

NOTES TO UNAUDITED PRO FORMA CONDENSED

CONSOLIDATED FINANCIAL INFORMATION

The accompanying Pro Forma Income Statements for the year ended December 31, 2009, and for the nine months ended September 30, 2010, give effect to CSG’s acquisition of Intec as discussed in Note 3, as if such acquisition had occurred on January 1, 2009, combining the results of CSG for the year ended December 31, 2009 and the results of Intec for the year ended September 30, 2009 (Intec’s fiscal year end), and combining the results of CSG for the nine months ended September 30, 2010 and the results of Intec for the nine months ended June 30, 2010. The accompanying Pro Forma Balance Sheet as of September 30, 2010 gives effect to the Intec acquisition as if it had occurred on September 30, 2010, combining the consolidated balance sheet of CSG as of September 30, 2010 and the consolidated balance sheet of Intec as of June 30, 2010. The Pro Forma Financial Information is unaudited and does not purport to represent what CSG’s consolidated results of operations would have been if the Intec acquisition had occurred on January 1, 2009, or what those results will be for any future periods; or what CSG’s consolidated balance sheet would have been if the Intec acquisition had occurred on September 30, 2010.

The Pro Forma Financial Information has been compiled in a manner consistent with the accounting policies adopted by CSG. The accounting policies of Intec were not deemed to be materially different to those adopted by CSG. Adjustments were made for presentational differences between IFRS and U.S. GAAP, as set out further in Note 6, together with adjustments arising as part of the acquisition accounting.

The Intec financial information has been translated from pounds sterling to U.S. dollars using the average exchange rates applicable during the periods presented in the Pro Forma Income Statements and the period end spot rate for the Pro Forma Balance Sheet.

On September 24, 2010, CSG announced its intention to acquire all of the shares of U.K.-based Intec in an all-cash transaction of 72 pence per Intec share (the “Intec Acquisition”), pursuant to Rule 2.5 of the U.K. City Code on Takeovers and Mergers.

On November 3, 2010, Intec’s Board of Directors announced that, at the court meeting and general meeting of eligible Intec shareholders, Intec shareholders voted to approve, by the necessary majorities, the transaction and other associated matters to implement the acquisition of Intec. On November 29, 2010, the transaction was sanctioned and the capital reduction was confirmed by the court. On November 30, 2010, the documents to finalize the transaction were filed and the transaction closed effective November 30, 2010.

The total purchase price and related preliminary excess total purchase price over fair value of net assets acquired is as follows (in thousands):

Except as discussed in Note 6 below, the carrying value of assets and liabilities in Intec’s financial statements are considered to be a reasonable estimate of the fair value of those assets and liabilities.

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The total purchase price allocation is considered preliminary and is subject to change once CSG receives certain information it believes is necessary to finalize its determination of the fair value of assets acquired and liabilities assumed. Thus the allocation of total purchase price is subject to refinement, and additional adjustments to record the fair value of all assets acquired and liabilities assumed may be required.

The Intec Acquisition was funded through the use of approximately $149 million of CSG’s existing cash, with the remainder funded through a new credit facility.

On September 24, 2010 and in conjunction with the Intec Acquisition, CSG entered into a $300 million credit agreement with several financial institutions. On November 24, 2010, CSG entered into an amended and restated $300 million credit agreement (the “Credit Agreement”), which was done as part of the final bank syndication process of the credit agreement.

The Credit Agreement provides for borrowings by CSG in the form of: (i) a $200 million aggregate principal, five-year term loan, and (ii) a $100 million aggregate principal five-year revolving loan facility.

The interest rates under the Credit Agreement are chosen at CSG’s option and are based upon an adjusted LIBOR rate plus an applicable margin, or an alternate base rate plus an applicable margin. The interest rate margin for the term loan is 375 basis points (3.75%) throughout the term of the Credit Agreement, and the interest rate margin for the revolving loan facility is based on CSG’s then-current leverage ratio. A commitment fee will be paid on the average daily unused amount of the revolving loan facility, with the annual commitment fee rate ranging from 50 – 75 basis points, based upon CSG’s then-current leverage ratio.

Mandatory repayments of the term loan (payable quarterly) for the first, second, third, fourth and fifth years are equal to 5%, 10%, 15%, 20%, and 25%, respectively, of the aggregate principal amount, with the remaining 25% of the principal balance due at maturity.

Upon closing of the Intec Acquisition, all of the $200 million aggregate principal of the term loan and approximately $35 million of the $100 million aggregate revolving loan facility were drawn down. In January 2011, CSG repaid the $35 million outstanding balance of the revolving credit facility.

In conjunction with the Credit Agreement discussed in Note 4, CSG incurred debt issuance costs of approximately $10 million. These costs are being amortized to interest expense over the lives of the term loan and revolving credit facility components of the Credit Agreement. The deferred financing costs are reflected in Other Assets in the accompanying Pro Forma Balance Sheet.

In conjunction with the Intec Acquisition, through December 31, 2010, CSG has incurred certain direct and incremental acquisition-related charges, totaling approximately $10 million, related primarily to investment banking, legal, accounting, and other professional services. In addition, through December 31, 2010, CSG has incurred approximately $2 million of restructuring charges related to the Intec Acquisition that CSG has not recognized as an existing liability of Intec at the acquisition date and thus has recorded currently in earnings.

The total purchase price of the Intec Acquisition was payable in pounds sterling. In September 2010, CSG entered into a pound sterling call/U.S. dollar put (the “Currency Option”) at a strike price of 1.62 in conjunction with the Intec Acquisition to limit its exposure to adverse movements in the exchange rate between the two currencies leading up to the expected closing date. Upon the approval of the acquisition by Intec’s shareholders in November 2010, CSG sold the Currency Option, and entered into a forward contract for the delivery of approximately 240 million pounds sterling (which included estimated Intec Acquisition costs at that time) at an exchange rate of approximately 1.61 (the “Currency Forward”). At the November 30, 2010 closing date, which represents the date

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the total purchase price is established under U.S. GAAP, the exchange rate between the pound sterling and the U.S. dollar was approximately 1.56 (which set the U.S.GAAP purchase price at $364.1 million). During December 2010, as part of the payment process for the pound sterling purchase price, CSG closed out its position in the Currency Forward at an average rate of 1.58. Under U.S. GAAP, the costs and proceeds (including gains and losses) from financial instruments that are used to reduce the risks of a change in the value of the acquiree’s net assets or the consideration to be issued by the acquirer before the date of acquisition, are not part of the consideration transferred and should be recorded currently in earnings, and should not be included in the determination of the purchase price. As a result, as of December 31, 2010, CSG recorded net expense of approximately $14 million related to these financial instrument transactions, and the foreign currency translation impact of intercompany notes established to structure the Intec Acquisition.

The Pro Forma Financial Information is based upon the historical financial statements of CSG and Intec and certain adjustments which CSG believes are reasonable to give effect to the Intec Acquisition. These adjustments are based upon currently available information and certain assumptions, and therefore the actual adjustments will likely differ from the pro forma adjustments. The Pro Forma Financial Information included herein was prepared using the acquisition method of accounting for the business combination. As discussed above, the purchase price allocation is considered preliminary at this time. However, CSG believes that the preliminary purchase price allocation and other related assumptions utilized in preparing the Pro Forma Financial Information provide a reasonable basis for presenting the pro forma effects of the Intec Acquisition.

Other than those described below, CSG believes there are no adjustments, in all material respects, that need to be made to present the Intec financial information in accordance with U.S. GAAP, and to align Intec’s historical accounting policies with CSG’s U.S. GAAP accounting policies.

The adjustments made in preparing the Pro Forma Financial Information are as follows:

For purposes of the pro forma presentation, the following adjustments were made to reflect our preliminary estimate of the fair value of the net assets acquired:

Adjustments were also made to the acquired assets and assumed liabilities of Intec to align the Intec IFRS financial information with CSG’s U.S. GAAP accounting policies. See note (f) Income Taxes below for additional adjustments. Goodwill, representing the total excess of the total purchase price over the fair value of the net assets acquired, was approximately $89 million. This allocation is based on preliminary estimates; the final acquisition cost allocation may differ materially from the preliminary assessment outlined above. Any changes to the initial estimates of the fair value of the assets and liabilities will be allocated to goodwill.

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As discussed in Note 5, as of December 31, 2010, CSG incurred approximately $12 million of acquisition-related costs (includes approximately $2 million of restructuring charges), and approximately $14 million of costs related to various foreign currency transactions associated with the acquisition, for a total of approximately $26 million. These costs have been accrued as a current liability, net of a $5 million tax benefit in the accompanying Pro Forma Balance Sheet. No adjustment has been made to the accompanying Pro Forma Income Statements for these items as these costs are considered non-recurring. However, because these types of costs are required to be expensed as incurred, the approximately $21 million net after-tax impact of these costs have been charged directly to retained earnings as of September 30, 2010.

As discussed in Note 4, upon closing of the Intec Acquisition, CSG borrowed $235 million under the Credit Agreement: $200 million related to the term loan and $35 million related to the revolving loan facility. In January 2011, CSG repaid the $35 million outstanding balance of the revolving credit facility. The accompanying Pro Forma Balance Sheet assumes that the total outstanding principal balance related to the term loan was $200 million, and the total outstanding principal balance related to the revolving credit facility was zero. The total debt issuance costs of $10.2 million incurred in conjunction with the Credit Agreement are reflected in Other Assets.

Adjustments to record pro forma interest expense of $11.5 million (includes $3.4 million of amortized debt issuance costs) and $8.2 million (includes $2.5 million of amortized debt issuance costs) were made for the year ended December 31, 2009 and the nine months ended September 30, 2010, respectively, related to the Credit Agreement. The base interest rate on the debt is variable, dependent upon LIBOR or a base rate, plus the applicable spread. The total amount of the variable interest rate (excludes the amortization of the debt issuance costs) used for calculating interest expense for the periods presented is assumed to be consistent with the December 2010 all-in interest rate of 4.06%. The sensitivity of interest rate fluctuations to interest expense is illustrated as follows: a 0.125% (12.5 basis points) variance in the interest rate in the Pro Forma Income Statements equates to a variance in interest expense of $0.3 million for the year ended December 31, 2009, and $0.2 million for the nine months ended September 30, 2010.

The Pro Forma Income Statements assume: (1) the outstanding principal amount related to the Credit Agreement’s term loan as of January 1, 2009 is $200 million; (2) the outstanding principal amount related to the Credit Agreement’s revolving credit facility as of January 1, 2009 and over the entire pro forma periods is zero; (3) mandatory quarterly prepayments of principal on the term loan of $2.5 million are reflected during 2009 and mandatory quarterly prepayments of principal on the term loan of $5.0 million are reflected during the nine months ended September 30, 2010; and (4) there are no optional prepayments of principal on the term loan. No interest income is assumed from any excess proceeds from the debt.

As the result of the pro forma adjustment described in note 6(a)iv above, adjustments to reduce total revenue were made for the year ended December 31, 2009 and the nine months ended September 30, 2010, of $0.6 million and $0.5 million, respectively. In addition, adjustments to reduce cost of revenue were made for the year ended December 31, 2009 and the nine months ended September 30, 2010, of $1.4 million and $1.1 million, respectively.

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Acquired finite-lived intangible assets were recorded at their estimated fair value of approximately $100 million. The weighted-average useful life of the acquired intangible assets is estimated at 9.6 years. Adjustments to record estimated amortization expense of $18.5 million and $13.9 million, respectively, were made for the year ended December 31, 2009, and the nine months ended September 30, 2010, and were reflected in the Cost of Revenues line item in the Pro Forma Income Statements.

In addition, adjustments to reverse amortization expense of $1.2 million and $0.2 million, respectively, were made for the year ended and the nine months ended periods related to Intec acquisition-related intangible assets that existed and were eliminated on the acquisition date, and that were reflected in the Selling, General and Administrative Expense line item by Intec.

An adjustment of $308 million to eliminate Intec’s stockholders’ equity balances was recorded in the Pro Forma Balance Sheet.

The following pro forma adjustments related to income taxes were made to the Pro Forma Balance Sheet:

The following pro forma adjustments related to income taxes were made to the Pro Forma Income Statements:

Certain balances were reclassified from the Intec financial statements so their presentation would be consistent with CSG.

The following reclassifications were made to the Pro Forma Balance Sheet (in thousands):

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The following reclassifications were made to the unaudited Pro Forma Income Statement for the year ended December 31, 2009 (in thousands):

Additionally, $0.5 million of Intec other income was reclassified out of operating income as it related to Intec discontinued operations.

The following reclassifications were made to the Pro Forma Income Statement for the nine months ended September 30, 2010 (in thousands):

Pro forma earnings per common share for the year ended December 31, 2009 and the nine months ended September 30, 2010, have been calculated using the same weighted average number of common shares outstanding used by CSG in its earnings per share calculation.

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