Hi mocacinno/nc50lc
I really appreciate your help.
Sorry, I did not describe my problem correctly. I mean I did the same steps as nc50lc said. get the seeds from cell phone, and create a new wallet on tablet and then enter the seeds that from cell phone. But the new wallet (with the same seeds as cell phone) on table is stall a watch-only wallet. I've already tried many time, remove it/re-install it but no any luck...help me.
strange.... My best guess would be that you now have two wallets on your tablet: one watch-only and a second "normal" wallet?
This, however, is a longshot... It's the most plausible explanation i can come up with right away.
To be honest, i only use electrum from my desktop, i don't have electrum for android installed. But the desktop version allows you to create as many wallets as you want, if the mobile version is the same (and allows multiple wallets), it might just have 2 wallets, and you just opened the watch-only one.
Do you have a clean device to retry the proces? Personally, if it was on my own device, i'd probably remove all wallets from my tablet and restart the process, but since i don't know your setup, i'm not sure if this would be a good idear (we don't want to end up removing a used wallet from wich you haven't written down the recovery seed)