T48G Ringtone Upload is not working

[Yealink Support]

Hi chris,

I think it is not issue of the phone. Because you upload the ring tone to the phone, it has be saved in the phone memory. After resetting the phone, the ring tone have be removed from the memory of phone. Although the config.bin includes the ring tone name, it didn't include the ring tone file. You can find size of the config.bin only a few Kb. So it will occur this issue. You can upload the ring tone via autop.
Please refer to the guide of autop.

autop guide

thanks