LTE  Standard  Module  Series 
   EC25  Mini  PCIe  Hardware  Design 
 
EC25_Mini_PCIe_Hardware_Design                                                                         11 / 79 
 
 
 
1.1. Safety Information   
 
The following safety precautions must be observed during all phases of operation, such as usage, service 
or repair of any cellular terminal or mobile incorporating EC25 Mini PCIe module. Manufacturers of the 
cellular  terminal  should  send  the  following  safety  information  to  users  and  operating  personnel,  and 
incorporate these guidelines into all manuals supplied with the product. If not so, Quectel assumes no 
liability for customers’ failure to comply with these precautions. 
 
Full attention must be given to driving at all times in order to reduce the risk of an 
accident.  Using  a  mobile  while  driving  (even  with  a  handsfree  kit)  causes 
distraction and can lead to an accident. Please comply with laws and regulations 
restricting the use of wireless devices while driving. 
Switch off the cellular terminal or mobile before boarding an aircraft. The operation 
of  wireless  appliances  in  an  aircraft  is  forbidden  to  prevent  interference  with 
communication systems. If the device offers an Airplane Mode, then it should be 
enabled  prior  to  boarding  an  aircraft.  Please  consult  the  airline  staff  for  more 
restrictions on the use of wireless devices on boarding the aircraft.   
Wireless  devices  may  cause  interference  on  sensitive  medical  equipment,  so 
please  be  aware  of  the  restrictions  on  the  use  of  wireless  devices  when  in 
hospitals, clinics or other healthcare facilities.   
Cellular  terminals  or  mobiles  operating  over  radio  signals  and  cellular  network 
cannot  be  guaranteed  to  connect  in  all  possible  conditions  (for  example,  with 
unpaid bills or with an invalid (U)SIM card). When emergent help is needed in such 
conditions, please remember using emergency call. In order to make or receive a 
call, the cellular terminal or mobile must be switched on in a service area with 
adequate cellular signal strength. 
The cellular terminal or mobile contains a transmitter and receiver. When it is ON, it 
receives and transmits radio frequency signals. RF interference can occur if it is 
used close to TV set, radio, computer or other electric equipment. 
In locations with potentially explosive atmospheres, obey all posted signs to turn 
off wireless devices such as  your phone  or other cellular  terminals. Areas with 
potentially explosive atmospheres include fuelling areas, below decks on boats, 
fuel  or  chemical  transfer  or  storage  facilities,  areas  where  the  air  contains 
chemicals or particles such as grain, dust or metal powders, etc.