STEP 1: Determine your remote model
Most people have a white DIRECTV remote like the one above. However, there are several models of DIRECTV remote, each with slightly different capabilities. Look at the upper left of the remote for its model number. If it ends with an X, that's a self-programming remote. These remotes have been in use since 2010 and when used with an H24, H25, C31 Genie Client, HR24 or HR34 Genie, they will respond to signals from your receiver so you don't have to enter codes. If it doesn't end in an X, you will have to take a few more steps, but it's not so hard.
If you have an HR44 Genie:
The HR44 Genie comes with an RC71 remote that works very similar to the X-series self-programming remotes. The earlier white remotes can be used in IR mode with the HR44 Genie, but they will not self-program even if you have an X-series remote.
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