sorry i have lost my mobilephone with the electrum wallet on it and some bitcoins.
Hope you password your mobile device? Hope not someone that knows about you and your wallet that stole the phone? These are some mistakes someone can make that can lead to compromised wallet and coin loss.
I got my password and also my seed. But if i install the wallet again on my new android mobilphone there is no bitcoin on it.
Just as simple as importing the seed phrase on another wallet. Password is not needed. But hope you did not include extra word (passphrase)? Which will generate different keys entirely.
Did you use extended word (passphrase) while generating the old wallet?
Or, did you install the wallet and never yet imported your seed phrase? Then follow this: click on standard wallet or the type you setup -> I already have a seed -> import your seed phrase.
Make sure you include extended word if you used it when you generated the wallet. To include the extra word and/or characters, click on the icon that resembles settings at the top right corner while importing the seed phrase and check (mark it right) it to proceed.