A good mobile phone for recording playing piano

[acomposer]

Hi,
I have been searching for a mobile phone, that would record my piano playing(only sound) with the best quality. I am an amateur composer(originally piano ex - student of a conservatory) and I would like to record my piano compositions to upload them on youtube. I have profesional recorders but the recordings are fussy with metalic sounds effects. The mobile phone I have been searching for, should cost  350 € at most. What should I buy?
Thanks a lot

[quantum]

Hi and welcome to Pianostreet.

I would recommend going with a portable recorder in your situation.  There are many to choose from.  A good place to start would be:
Zoom H4n
Tascam DR-40X
Roland R-09

Portable recorders, such as the ones above are designed for music recording and have very capable mics and preamps.  You probably won't find a phone in that price range that specifically does music recording well.  These portable recorders will far outlast a smart phone in terms of usage, so you will be spreading the cost of it over many years. 

As they are purpose built, these portable recorders are easy to operate.  Buttons for record, play and stop.  No need to open an app, no installing updates when you want to record.  After initial setup, it is generally as easy as insert SD card, turn it on, press record. 

No matter what recorder you get, gain levels need to be set correctly and the microphone needs to be placed in an appropriate location to capture the best sound.  If these things are not done, there is the potential for bad sounding recordings. 

[anacrusis]

I second the advice from quantum. You might get an allright phone at 350 € but far from spectacular in the video nor audio department. What kind of proffessional recorders do you have right now?

[larrys]

There is a camera app for Android phones (open camera) which has a setting allowing use of an external mike. If you can get hold of a mike with a phone USB connector it would improve the quality of your recording.

[lelle]

That's cool! What are some good external USB mikes?

[larrys]

That's cool! What are some good external USB mikes?

I'm not sure of the brands or how widely available they are, but you can find one it will be a lot cheaper than buying a Zoom or similar device.