This app was mentioned in 11 comments, with an average of 1.27 upvotes
Try phone clone https://play.google.com/store/apps/details?id=com.hicloud.android.clone
Or
Mcbackup, save your contact list then upload to drive then dl on your new phone. https://play.google.com/store/apps/details?id=com.globile.mycontactbackup
I'm still trying to transfer files from my pixel 2 xl to my new p30 pro but phone clone won't connect..
https://play.google.com/store/apps/details?id=com.hicloud.android.clone
Phone Clone is a convenient data migration application provided by HUAWEI. You can transfer the contacts, SMS,call logs,notes,recordings,calender, photos, music, videos,documents and applications of your old phones to new Huawei smartphone.
Works with IOS.
WhatsApp can be backed up in app
The absolute best way to transfer all your info over with Huawei phones would be to install this app, the Huawei Phone Clone: https://play.google.com/store/apps/details?id=com.hicloud.android.clone&hl=en
Install on both devices, and choose the S7 as the "Old device" and the P20 as the "New device". Works like a charm on most instances.
Personally used it to move stuff from my Honor 6 to a Mate 10, however, the faulty sd card drive on my Honor 6 enabled me to just copy all the information over on the Mate and then copy them over to the SD card manually. As the P20 doesn't have an SD card slot, hope nothing goes wrong for you then!
En effet c'est gênant essaye Airdroid alors <edit> En fait tu as peut être plus simple : https://play.google.com/store/apps/details?id=com.hicloud.android.clone&hl=fr
Tu me diras si tu t'en est sorti je vais aller rejoindre Morphée :) <edit Bis> il y a même un tuto en français la : http://www.cnetfrance.fr/news/honor-8-transferer-ses-donnees-depuis-un-iphone-ou-un-smartphone-android-39844310.htm
If you buy a Huawei, you can use their phone clone feature.
Phone Clone Link
Edit: You may not want a Huawei, but if interested, I'll vouch for Mate 9. I'm loving mine.
Mate 9 Amazon
Just recently Huawei released "phone clone" just for that. Or at least I just recently saw an advert for it.
See here: https://play.google.com/store/apps/details?id=com.hicloud.android.clone
For sms: should work with Huawei suite and most likely with the Samsung tool, too. Or hopefully with the new tool mentioned above in my comment.
Theres plenty of them, usually by phone manufacturer trying to lure customer into their brands. Most are available on the playstore ie Huawei's Phone Clone and Xiaomi's Mi Mover and OnePlus's Phone Clone
Those should work on all android phones despite made by specific phones brand. Personally I've used the Huawei's one and it works foawless, cloned most data from my old phone to the new one. I've said most and not all because app data doesn't and won't transfer over unless both phone is rooted and using Titanium Backup.
No just the android one.
See if it let's you install this on your android phone
https://play.google.com/store/apps/details?id=com.hicloud.android.clone
Huawei has an app on play store called Phone clone. It transfer data pretty quickly over wifi.
There is an app that is supposed to help. Haven't tried it myself though - https://play.google.com/store/apps/details?id=com.hicloud.android.clone