Re: I did a factory data reset, and have lost all my numbers. Please suggest some way of getting them bac
09-10-201510:55 - edited 09-10-201510:56
In the absence of any further of information, like the model, I'm going to have to assume it's an Android phone.
If you connected the handset to a Google account before the factory reset, then your contacts have been backed up by Google unless you specifically told it not to. Connecting to an account is part of the setup process and is primarily for using the Google Play Store.
Now you've done the reset, you need to connect to the same Google account and those contacts will be restored automatically.
If it doesn't work, it didn't get chance to do a backup before the reset, or you didn't connect your account, you need to have made alternative arrangements to backup your phone. If you didn't do that, then you'll need to enter your contacts manually.