My contacts in other countries have at least two phone numbers, one is shorter than the other due to the area code and country code. When I go to the country and try to text it fails because it picks up the wrong phone number no matter what I try I must delete the entire conversation and start over new.
I do not want to delete conversations
Now I back up to email the conversations I want to keep before I go to the country and then wipe them out so I can communicate in the country
Backing up a long conversation is very onerous I would like a select all function

Nexus 5