Harris Bank rolled out wireless technology Tuesday that enables customers to check investment and deposit accounts using cellular phones.The Chicago-based unit of Bank of Montreal is working with Toronto-based 724 Solutions Inc. and Kansas City, Mo.-based Sprint PCS. The 100 Harris customers who have signed up for the service can view their account balances and transactions in real time, transfer funds between accounts, reorder checks, look at stock and index quotes, and view personal investment portfolios. The service is currently free, but the banking company said it will eventually charge a fee.

Wireless services have been available to Bank of Montreal customers in Canada since May.

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