Equip Gogo or Umaro with Esper...
	Google Play Achievements...
	Mog early...

First touch equip or status in the menu with Gogo or Umaro in your party, then before you select a character in either sub menu quickly touch the back button and then touch where Gogo or Umaro would equip an esper (which is empty space). If done correctly you should highlight a blank box and go into the esper equip menu. Although neither can actually learn the spells espers teach, they can however gain the stat boost upon level up.

Achievement	How to unlock
A Chance in a Pinch	You discovered all of the hidden "Blitz" commands.
An Uncommon Wizard	You learned all of Strago's "Lore" commands.
Enough Already!	You continued to defeat Ultros to the bitter end.
Final Fantasy VI Master	You unlocked all achievements.
Fun to Save, Fun to Use	You accumulated over 1 million gil.
Gateway to the Top	You racked up 10 wins at the Coliseum.
King of the Beasts	You learned all of Gau's "Rage" commands.
Masterful Mastership!	You learned all of Sabin's "Blitz" commands.
Mech Mania	You got all of Edgar's "Tools."
Quintessential Adventurer	You opened more than 80% of all treasure chests.
Sword Master	You learned all of Cyan's "Bushido" commands.
The Road to Esper World	You collected all the Magicite.
Wandering Gambler	You matched all the symbols on Setzer's "Slots".
Wish You Were Here	You defeated Deathgaze.

As soon as you can control your airship, fly to Narshe. Chase the Lone Wolf thief by entering the treasure hunter's house in the eastern part of the town. After following the thief, you will get the chance to save Mog in the mines. After saving him, he will join your party.