The robbery happened at the AT&T store on 13630 East Freeway on Friday morning.
The robbers make two employees and a customer go into the back room. Then, another customer enters the store, but he has no idea there is an armed robbery going on, until he sees that gun.
That customer is told to also get in the back room.
RAW VIDEO: Armed robbers terrorize AT&T store
Everyone is told to get face down on the floor while the robbers try to get into the safe, which an employee opens. Boxes and boxes of brand new cell phones and tablets are inside, which the robbers shove into bags and boxes and carry out the store.
"I am worried about my neighborhood getting more bad like this," said customer Ipe Mathai, who arrived at the store after the robbery.
Just two weeks ago, the same store was hit by robbers. Store employees say two incidents were similar -- two armed suspects forced everyone to the back of the store, that time for money.
The store released the following photos of the two suspects in that robbery:
Nobody was hurt in either robbery.
Anybody with information about the men's identities should contact the Harris County Sheriff's Office.