Hello Ive downloaded the mobile version of electrum via Google Play store, and it is 3.3.7 version. The new 3.3.8 has no update yet, but can I ask should I have deleted the one Ive downloaded and stream again this new version from electrum download directly? Cause there is no update yet from Playstore. Or there is none difference on technical aspect even I dont upgrade it. Thanks.
You can see the 3.3.8 release notes here:
https://github.com/spesmilo/electrum/blob/master/RELEASE-NOTES#L7-L13Whether those changes are important to you or not is only really something you can determine, although generally speaking, it's better to get the lastest version. If you download the 3.3.8 APK directly from the Electrum website and verify the signature, you should be able to simply install it and it will automatically update the version on the phone without you needing to uninstall 3.3.7 first (I just tested this on my phone).