Looking to buy a phone and wonder if there is a limit on the number of addresses a phone can have in its address book can I have more than one address book and can I down load the addresses from a pc. Also I may want a custom programed app where do I find a reputable company do create it?
android devices manage contacts via the Google Account (Gmail) and can be managed online here https://contacts.google.com/
I don’t think there an upper limit though at some point there needs to be space on the Phone
It’s also possible to have a different contact app from the Google play store that will keep contacts not link to the Google account,
the best place to find an app developer would be the android developer boards https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=android+developers+forum