Wireless-only service: Look in Usage by number section, find the device you want to manage, and select View more usage details and options. Choose See data, text, and talk logs.
More than one service: Look in Basic plan usage section, find the device you want to manage, and select View usage details. Choose how you want to view your details.
Select Download, then CSV or Excel. (Don’t see these options? Use the forward arrows to get to the last page. Once you see all your records, you can download them.)