Root apps log in concern when selling phones

[optimusv45]

I have a Nexus S 4G with no service. I have noticed no matter how many times i flash roms the old phone number is forever kept in Phone Identity. My question is when i sell my Evo V will the person after me be able to log in my accounts on apps such as Kakao talk, Whatsapp, and Line? since these apps have auto log-in with recognition of phone numbers.

 

[goshjosh]

Maybe. /: Only Option I see is removing your phone number information from that app in the account settings of the apps, if it's possible.

Also, I don't think the person that would buy it from you would be able to access it because they would be putting the phone on a different company maybe and get a different phone number thus changing the Phone Identity number

 

[EarlyMon]

Factory reset the phone and format storage.

Call the carrier and have them deactivate the phone.

 

[Kritter888]

they h
ad me on my old rise use some dialer codes in the phone to get into there system where u can program the phone and change the numbers that was orginally in it to all ones whoich reset the phone, and it was inactive theyll probably do the same for u cause my inactive rise still had a data connections and they where confused so they had me do that i was confused also, cause i had no ideal what i had done to keep data on with no voice infact if u dialed a number it would say reliable services, was never flashed , i was just concerned about selling the phone or giving it aeay with a active data connections that it would count against my 2.5 gigs of data per month that i can easily kill just myself
At this point I had my new htc evo v 4g activated and my old rise with still a active data connection