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Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: Quectel
  • Model Number: EC20 EC21 EC25
  • Product name: Low price multi sim modem Quectel 4G 8 port gsm usb imei change modem
  • Interface: USB
  • Chipset: EC20/EC21/EC25
  • Function: stk ussd imei changeable
  • Application: bulk send/receive sms
  • Port No option: 4port/8port/16port/32port/64 port
  • Other brand option: wavecom/sierra/simcom/quectel/siemense/huawei
  • Other chipset option: SL808X/UC15/EC25/Sim5215/5320/5360/TC35I/MC55I/MC35
  • Name: 4g modem pool
  • Type: low price multi sim modem

Packaging & Delivery

Packaging Details Natural packing for modem pool
Delivery Time 2-5 business days

Low price multi sim modem Quectel 4G 8 port gsm usb imei change modem


Product Description


Product Show





4G LTE FDD Modem

Module  (Optional)(1) Quectel EC20 
(2) Quectel EC21
(3) Quectel EC25
Interface(Optional)(1) RS232 +Min USB


(2) RJ45 + RS232 + Min USB

Working Frequency


(1)EC20 -E     FDD LTE: 850/800/900/1800/2100/2600 MHz
                        UMTS:  850/900/2100 MHz
                        GSM: 850/900/1800/1900MHz
(2)EC20 -A     FDD LTE: 700/850/1700/1900 MHz
                        UMTS: 850/1700/1900 MHz
                        GSM: 850/1900MHz
(3)EC20 -C     FDD LTE: 900/1800/2100 MHz
                        TDSCDMA 1900/2100 MHz
                         UMTS: 2100 MHz
                         GSM: 900/1800MHz
(4)EC20 -CE    FDD LTE: 1800/2100 MHz
                         TDSCDMA: 1900/2100 MHz
                         WCDMA:  2100 MHz
                         GSM: 900/1800MHz

(1)EC21 -E      FDD LTE: 800/850/900/1800/2100/2600 MHz
                         WCDMA:850/900/2100 MHz
                         GSM: 900/1800 MHz

(2)EC21 -A      FDD LTE:700/1700/1900 MHz
                         WCDMA: 850/1700/1900 MHz
                         GSM: 900/1800MHz

(3)EC21 -V      FDD LTE: 700/1700 MHz
(4)EC21-AUT   FDD LTE: 700/850/1800/2100/2600 MHz
                          WCDMA: 850/2100MHz
(5)EC21-AUTL FDD LTE: 700/1800/2600 MHz

(1)EC25 -E       FDD LTE: 850/800/900/1800/2100/2600 MHz
                          WCDMA: 850/900/2100MHz

(2)EC25 -A       FDD LTE: 700/1700/1900MHz
                          WCDMA:  850/1700/1900MHz
                          GSM: 900/1800MHz
(3)EC25 -V       FDD LTE: 700/1700 MHz
(4)EC25 -AUT   FDD LTE: 700/850/1800/2100/2600 MHz
                           WCDMA: 850/2100MHz




Advantage 1 = BUlK SMS



Mutil port sms gateway SMS per hour= 900pcs/hour *8 ports =7200 pcs sms per hours

With a very stable and such a big SMS sending capability that you can easily to start your business campain /election campain/our community notification for any activity .


There are two kinds of BULK SMS Software (Optional)


ItemSoftware NamePriceProduct
1Caster SoftwareFree Download Software from the website
2Premuim SoftwareAdditional money



(1)Picture- Caster Software 



(2)Picture- Premuim Software






Advantage 2= STK / USSD Mobile recharge

Function= Top Up / Mobile Recharge + Check Balances

STK consists of a set of commands programmed into the SIM which define how the SIM should interact directly with the outside world and initiates commands independently of the handset and the network. This enables the SIM to build up an interactive exchange between a network application and the end user and access, or control access to, the network. The SIM also gives commands to the handset such as displaying menus and/or asking for user input.


USSD is commonly used by prepaid GSM cellular phones to query the available balance. The vendor's "check balance" application hides the details of the USSD protocol from the user. On some pay as you go networks, such as Tesco Mobile, once a user performs an action that costs money, the user sees a USSD message with his or her new balance. USSD can also be used to refill the balance on the user's SIM card and to deliver one time passwords or PIN codes.


Advantage 3= Change IMEI


What is "IMEI"? 


"IMEI "is a abbriviation  for "International Mobile Equipment Identity ",International Mobile Equipment identification number is by the 15 of digits "electronic string of number",and this code is the world's only. Each a mobile phone in after the completion of the assembly will be given a global only a group of number, the number from production to delivery will be took record.


Why need to change "IMEI" ?


 When you use the modem pool for SMS too much ,due to the operator policies,your device will be blocked  .World of operators will be same condition ,So if u want a SMS competition business,IMEI changing function is very needed


Optional Item 


(1)Network:  2G /3G /4G 

(2)Ports : 4 port /8 port /16 port / 32 port / 64 port 




How to insert sim cards ? 



Packing List


(1)  1x modem pool

(2)  1x USB cable

(3)  1x Power Adapter

(4)  1x CD

(5)  8 x Antenna




Packaging & Shipping

Packing : Neutral packing




Our Services


We offer the best services and saleafter to our customers, Pls feel free to contact us! 

Before packing,we have strict testing system to insure the high quality of our goods.

Company Information

HONGKONG BaiLing International Co.,Ltd is a foreign trade company with 8 years experience.We have our sales department,technical department and also production department.With the endurance of our research and development department,our main products are all have CE&ROHS certificates.Our faith is to provide the best goods for our best customers.




1.How to place an order?
Please send us an inquiry to me ,I will reply to you within 12 hours

2.How to send the money?
(1) T/T (2) Paypal (3) Western Union (4 )Alibaba (5) Wechat (4)  Alipay.

3.When will you send out the goods?And how long time we received them?
Normally , we will send out the goods within one week 
(1) DHL :3-5days (2) UPS :4-6 days (3) Fedex: 6-8 days (4) TNT/Amerax : 8-10 days (5) EMS: 15-20 days
4.How long time warranty of your products?
One year warranty from the date we send out the goods.

5.If any problems on the products,how can we get the warranty maintenance?
(1)Usually if under warranty,we will offer free spare parts to replace;
(2)If can't be fixed,we will provide free new one to replace,we will share 50% and 50% for the shipping cost
(3)If out of warranty,you need to pay for the spare parts or new one and the shipping cost.
Contact Details 






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Transaction Overview


Transaction Details

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Transaction Value
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Trade Assurance
China (Mainland)
Transaction Level:
Supplier Assessments:
40 Transactions 10,000+
The supplier’s transactions conducted via Alibaba.com in the past 6 months.
The supplier supports Trade Assurance – A free service that protects your orders from payment to delivery.
Supplier's Trade Assurance Limit: US $57,000
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