SIM card: T-Mobile myTouch by Huawei[1]

To insert or remove the SIM card, follow these steps:

Insert

1. Power the phone off.
2. 
3. Remove the back cover using the notch located at the bottom  of the phone.
4. Lift the battery out.
5. 
6. Gently slide the SIM card into the slot with the gold  contacts facing down.
7. Replace battery by inserting with logo side up  and align with gold contacts.

Remove

1. Power the phone off.
2. Remove the back cover using the notch located at the bottom  middle of the phone.
3. 
4. Lift the battery out.
5. Slide the SIM card out of the slot.
6.