T - -Mobile-

T - -Mobile- Law Enforcement Relations Group 4 Sylvan Way Parsippany, NJ 07054 Direct Dial: 973-292-8911 Fax: (973) 292-8697 NOTICE REGARDING TIM ESTAM P ON TM US CALL DETAIL RECORDS 1-Mobile US, Inc. (which includes 1-Mobile USA and Metro PCS) stores and maintains call detail records in several different native formats. The most current call detail records are stored and maintained in Coordinated Universal Time ("UTC"). UTC is not a time zone, but a time standard that is the basis for civil time and time zones worldwide. UTC operates independently of country specific time zones and/or seasonal adjustments, such as Daylight Savings Time. Older call detail records are stored and maintained in the time zone associated with the user's location at the time of the call. UTC is the equivalent of GMT. If you received call detail records in a spreadsheet format, they are timestamped in UTC. If call records have been produced, the transactions reflect UTC timestamps that correspond