SIM900

Connected via USB to Serial, with baud of 9600

ATI
SIM900 R11.0

OK

+CBAND: (EGSM_MODE,PGSM_MODE,DCS_MODE,GSM850_MODE,PCS_MODE,EGSM_DCS_MODE,GSM850)
+SGPIO: (0-1),(1-12),(0-2),(0-1)   
                                             
AT+GSV
SIMCOM_Ltd                                                                      
SIMCOM_SIM900                                                                   
Revision:1137B15SIM900M64_ST 

AT+CDEVICE?
Device Name:ST_M36W0R6050U                                                      

AT+CGID=?                                                                       
+GID: 255,255  

AT+CSPN?
+CSPN: "Hologram", 0  

AT+CSQ
+CSQ: 19,0

Can haz engineer mode!?

AT+CENG=1
AT+CENG?
+CENG: 1,0                                                                      
                                                                                
+CENG:0,"0759,33,99,310,260,06,4ab1,08,03,e1,2"                                 
+CENG:1,"0686,04,191,000,00,0"                                                  
+CENG:2,"0683,03,191,000,00,0"                                                  
+CENG:3,"0672,01,255,000,00,0"                                                  
+CENG:4,"0810,01,255,000,00,0"                                                  
+CENG:5,"65535,255,00,000,00,0"                                                 
+CENG:6,"65535,255,00,000,00,0" 

HOLY PHLIP'N TXT BATMAN

AT+CMGF=1
AT+CMGR=1
+CMGR: "REC READ","+7074151337","","17/05/06,01:45:35-28"
HelloCat!

Phreak

Amazon listing: https://www.amazon.com/dp/B00TEUAJMQ/ref=wl_it_dp_v_S_ttl?_encoding=UTF8&colid=1D236FJXO2B8U&coliid=I16HU6WZIUXH6I