RESTON,Sprint Nextel (NYSE: S) picked Wall Street financial advisory firm Lazard on Sunday as its appraiser in a dispute with Nextel partners.

Nextel Partners is being represented by Morgan Stanley.

The dispute centers around the merger of Sprint and Nextel earlier this year. Nextel Partners, a Nextel affiliate, has nearly 2 million customers and wants to be bought out at a premium as a result of the merger.

Both companies agreed to pick arbitrators to help resolve the dispute.

Sprint Nextel has already settled lawsuits with several other affiliates that resulted from the merger.

Sprint Nextel: