September 8, 2009 MDI, Inc. 12500 Network Blvd., Suite 306 San Antonio, Texas 78249 Ladies and Gentlemen:

Exhibit 4

September 8, 2009

MDI, Inc.

00000 Xxxxxxx Xxxx., Xxxxx 000

Xxx Xxxxxxx, Xxxxx 00000

Ladies and Gentlemen:

This letter makes reference to that certain Stock Purchase Agreement, by and among MDI, Inc., Almana Networks International, Inc., and the Holders signatory thereto, dated as of September 8, 2009 (the “Purchase Agreement”). Capitalized terms used herein but not defined shall have the meanings set forth in the Purchase Agreement.

Each Holder hereby agrees that as to Escrow Shares which have not yet become Released Shares (the “Unreleased Shares”), such Holder shall not exercise or enforce such Holder’s voting and dividend rights to with respect to such Unreleased Shares as provided for in Section 1.3(b). Each Holder’s agreements contained herein shall not apply to any such shares once such shares have become Released Shares pursuant to the Purchase Agreement.

	Very truly yours,
		ALMANA NETWORKS INTERNATIONAL, INC.
		By:	/s/ Swaraj Bontula
		Name:	Swaraj Bontula
		Title:	CEO
		ALMANA NETWORKS SOLUTIONS
		By:	/s/ Swaraj Bontula
		Name:	Swaraj Bontula
		Title:	CEO

	XXXXXX INVESTMENTS, L.P.
	By:	/s/ Xxxx Xxxxxx
	Name:	Xxxx Xxxxxx
	Title:	General Partner
	/s/ Swaraj Bontula
	Swaraj Bontula
	/s/ Xxxx Xxxxxx
	Xxxx Xxxxxx
	/s/ Xxxxxx Xxxxxx
	Xxxxxx Xxxxxx

AGREED to and ACCEPTED as of the date hereof.
MDI, INC.
By:	/s/ X. Xxxxxxx Sparks
Name:	X. Xxxxxxx Xxxxxx
Its:	CEO and President

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