I just found a compatible version but from an unknown source claiming to offer safe APK.
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Seriously, i have just understood that i can get a compatible version for my mobile android from the github releases. No i didn't download any apk from an unknown source but the site i found for apk contains all versions of bitpay wallets and i didn't find any accusations about it in the web. You can take a look here:
https://apkpure.co/bitpay-secure-bitcoin-wallet/About the apk, there are "clone"websites, but I would not entrust my funds to them. I have no idea why did OP uninstall for upgrade. If the upgrade is correct and legit, it will come as an upgrade, not as reinstall.
As i had a stored seed, i thought that i can reinstall a new upgraded version instead of upgrading the installed one.
Yes my mobile phone is old and run with 4.4.2 android version, and i think all the mobiles i tried run with old versions too.
Thank you everybody