This is a list with the keys 3g compatible with the FL-MR4420ND and FL-MR4210ND

Series No. Model supplier network system
HX1 HUAWEI E153 HUAWEI WCDMA
HX10 HUAWEI E158 HUAWEI WCDMA
HX100 ZTE MF637U ZTE WCDMA
HX102 TXT EV-100 TXT EVDO
HX104 TXT EV-91 TXT EVDO
HX109 TXT W-11(BLACK) TXT WCDMA
HX11 HUAWEI E160 HUAWEI(SFR) WCDMA
HX114 PUCHUANG E004 PUCHUANG EVDO
HX115 PUCHUANG E005 PUCHUANG EVDO
HX119 PUCHUANG W001 PUCHUANG WCDMA
HX120 PUCHUANG W002 PUCHUANG WCDMA
HX121 PUCHUANG W003 PUCHUANG WCDMA
HX122 PUCHUANG W004 PUCHUANG WCDMA
HX125 XUNTANG ST909 XUNTANG WCDMA
HX127 TIANYI(BLACK) TIANYI(surfing) EVDO
HX128 XUNTANG ST809 XUNTANG EVDO
HX130 XUNTANG ST890 XUNTANG EVDO
HX131 XUNTANG ST904 XUNTANG WCDMA
HX132 AOXIAN W80 AOXIAN WCDMA
HX134 KLK CKG-1800M KLK EVDO
HX135 AOXIAN EC690 AOXIAN(TIANYI) EVDO
HX136 AOXIAN(BLACK) AOXIAN EVDO
HX140 Lexmark Pu 7200 Lexmark Pu WCDMA
HX141 SEV759 SCV(purple) EVDO
HX144 SHICHUANG W50 SHICHUANG WCDMA
HX146 JINYU W10 JINYU WCDMA
HX147 PINSU TU930 PINSU TD-SCDMA
HX152 GAOKE W601 GAOKE WCDMA
HX153 LIANMENGKE 6260 LIANMENGKE (HSDPA) WCDMA
HX155 no model cheap copy card WCDMA
HX157 AOXIAN C819 AOXIAN EVDO
HX158 HUAWEI E170 HUAWEI WCDMA
HX159 RONGXUN RX310 RONGXUN TD-SCDMA
HX16 HUAWEI E1780(KPN) HUAWEI WCDMA
HX160 HONGHU HSDPA HSDPA WCDMA
HX161 OVATION NRM-MC950D OVATION WCDMA
HX162/HX164 TIANYI(WHITE) TIANYI(surfing) EVDO
HX167 Chris no model Chris(HSDPA) WCDMA
HX169/HX172 TIANYI(BLACK) TIANYI(surfing) EVDO
HX17 HUAWEI E156G(WHITE) HUAWEI WCDMA
HX174 MMX 310G Micromax WCDMA
HX175 no model MTNL WCDMA
HX176 JINYU A30 JINYU EVDO
HX177 Baer Shanghai ASB C820 Baer Shanghai EVDO
HX179 HSDPA HSDPA WCDMA
HX185 LEITE EC606 same as AOXIAN EC70 SCV EVDO
HX186 no model   EVDO
HX187 PT20 PANDA TD-SCDMA
HX190 AOXIAN A90 AOXIAN EVDO
HX191 no model cheap copy card(HSDPA) WCDMA
HX23 HUAWEI E1782(SingTel) HUAWEI WCDMA
HX24 HUAWEI K3765 HUAWEI (vodafone) WCDMA
hx34 huawei ET127 HUAWEI TD-SCDMA
hx35 huawei ET128 HUAWEI TD-SCDMA
HX26 HUAWEI E1820 HUAWEI WCDMA
HX27 HUAWEI 160G HUAWEI WCDMA
HX28 HUAWEI E169 HUAWEI(SingTel) WCDMA
HX29 HUAWEI K3715(vodafone) HUAWEI WCDMA
HX3 HUAWEI UMG181 HUAWEI (TMobile) WCDMA
HX32 HUAWEI E1752 HUAWEI WCDMA
HX33 HUAWEI E173 HUAWEI WCDMA
HX38 HUAWEI E261 HUAWEI WCDMA
HX4 HUAWEI E1552 HUAWEI WCDMA
HX40 HUAWEI EC1270 HUAWEI(TIANYI) EVDO
HX42 HUAWEI E272(vodafone) HUAWEI WCDMA
HX44 HUAWEI E226(vodafone) HUAWEI WCDMA
HX46 HUAWEI EC167 HUAWEI EVDO
  huawei ec156 HUAWEI EVDO
  huawei E1261 HUAWEI EVDO
hx111     EVDO
hx165 SCV   EVDO
hx194 EC181 LEITE EVDO
HX166 SCV   EVDO
HX48 HUAWEI E161 HUAWEI (O2) WCDMA
HX49 HUAWEI E150 HUAWEI (MTC) WCDMA
HX5 ZTE MF100(O2) ZTE WCDMA
HX54 HUAWEI E1762 HUAWEI (SingTel) WCDMA
HX56 HUAWEI E176 HUAWEI (TMobile) WCDMA
HX68 MF 180 beetel WCDMA
HX69 MF 190 ZTE(ReLI) WCDMA
HX7 HUAWEI E160E HUAWEI WCDMA
HX80 ZTE AC2726 ZTE EVDO
HX77 ZTE AC590 ZTE EVDO
HX79 ZTE AC582 ZTE EVDO
HX81 ZTE MF628 ZTE WCDMA
HX82 ZTE MU350 ZTE TD-SCDMA
HX85 ZET MF633BP+ ZTE(NEXT) WCDMA
HX86 ZTE AC2766 ZTE EVDO
HX87 ZTE AC580 ZTE EVDO
HX129 ST880U XUNTANG EVDO
HX89 ZET MF110 ZTE WCDMA
HX91 ZTE MF626 ZTE(TMobile) WCDMA
HX84 ZTE MF636 ZTE WCDMA
HX95 ZTE MF627 ZTE(SMART) WCDMA
HX96 ZTE AC2746 ZTE EVDO
HX99 ZTE MF633 ZTE WCDMA
HX21 HUAWEI E156G(BLACK) HUAWEI WCDMA
HX6 HUAWEI E1750 HUAWEI WCDMA
HX36 HUAWEI E270 HUAWEI WCDMA
HX14 HUAWEI E1550 HUAWEI(3) WCDMA
HX195 LEITE UC125 same as HUAWEI E261 LEITE WCDMA
HX2 HUAWEI E1556 LIANMENGKE(HSDPA) WCDMA
HX137 H80 SHICHUANG EVDO
HX149 MC930D   WCDMA
HX71 ZTE K3765-Z ZTE WCDMA
HX142 HS970   WCDMA
HX188 ACE-CE-300    
  Lenovo W100 Lenovo EVDO
HX151 Star-net  TD2000   TD-SCDMA
HX76 ZTE AC2736 ZTE EVDO
HX106 TIANYI TIANYI(surfing) EVDO
HX90 ZTE ZTE-T A355 ZTE EVDO
HX92 ZTE MF636 HSDPA WCDMA
HX9 HW vodfon E172 HUAWEI WCDMA