I asked the same question earlier in this thread...I used Mi Mover between LG an Mi4c and it didnt work to well....I will be buying an A1 in the coming months...very curious to know the solution ....please let us know what you discover....
Well, I have moved from a samsung galaxy s6 to the A1 which is now my main phone.
I have used "easy backup" to save and restore my sms's and call history, and that's about it, because my contacts are synched with google, whatsapp has the ability to backup to Drive, and all the apps are automatically installed if you have them synced too.
Use the cloud to your own benefit. Is the best way to change phones and keep everything at the fingertip...
On another note, oh boy what a difference... I was struggling to get to the end of a work day (10 hours) with a battery charge and no more than 1 to 1.5 houres of screen time, now I get 2 full days and 4 to 5 houres of screen time.
The phone is fast and navigation is super smooth.
The only downside from my perspective is the size of the phone, but this comes from a guy that was used to a 5.1 inch phone that was easily operated with one hand, and I find it difficult to do it with the A1. I believe it is just a matter of time until I get used to it.
For those who don't like the fingerprint sensor on the back, I would also like to let you know that the smart lock face recognition works like a charm (even in low light), and that is a great, because you can unlock it easily when the phone is on a table or on a car craddle without having to pick it up and touch the fingerprint sensor (wich by the way is much better than the samsung's).