please make sure to type the seed correctly. If just one of the 81 characters si wrong you might access to a seed with an empty balance.
Eventually exporting the SeedVault from your other phone and importing it to this one.
To export your seed vault in Trinity on mobile go to Settings - Account Management - Export SeedVault
For further and faster help by the community visit our #help channel on discord (https://discord.iota.org)
Please remember that IOTA Foundation members will never ask for your seed when assisting you. Please keep your seed safe!