T-Mobile High-Speed Internet Gateway Operator 
Manual
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Issue: DRAFT Nokia 3TG-01275-AAAA-TCZZA 63
 
7 Replacing battery and SIM card
7.1 Purpose
7.2 General
7.3 Recommended tools
7.5 Safety information
7.6 Procedures
7.1 Purpose
This chapter provides the steps to replace the battery and SIM.
Replacing the battery from the T-Mobile High-Speed Internet Gateway is intended to 
be a simple user experience for most installations. The battery and SIM card are 
located in the T-Mobile High-Speed Internet Gateway and is accessed by removing 
the base. 
7.2 General
The steps listed in this chapter describe how to remove the battery and SIM from the 
T-Mobile High-Speed Internet Gateway.
Note —  The T-Mobile High-Speed Internet Gateway has a 
pre-installed SIM card and battery. 
Note —  There are two liquid damage indicator (LDI) sticks 
pasted in the T-Mobile High-Speed Internet Gateway:
• On the side of the inner frame close to the vents
• On the bottom door, which is attached with screws
Note —  Refer to the T-Mobile High-Speed Internet Gateway 
Customer Release Notes before removing the battery or SIM 
from the T-Mobile High-Speed Internet Gateway.