You should ask this in the Electrum sub-forum... or wait for a mod to move it for you.

Long story short - without your seed phrase you are screwed. *Possibly* you might be able to trawl the bytes on your mobile's storage drive, looking for a private key(s). It depends whether you encrypted your wallet (then it won't work), and how thorough the 'factory reset' was (if it overwrote every byte of space, you're screwed). Also you have to find an automated program that does this.

Can you remember *any* words of your seed? The more you can remember the more chance a 'brute force' search can find the right phrase - again you'll need a specialised program for it. Don't, of course, tell any of us here any words you remember.