When we try to get nearby cells and their LAC, MNC, signal (and while using other android apps) we are getting signal as negative value (like -85dbm). How should I take this? Should I ignore -ve si...

I want to make a call using my GSM modem. So I wrote the below program: import time import serial recipient = "+98xxxxxxxxxx" phone = serial.Serial("COM10", 115200, timeout=5) try: time.sleep(0...

I am using SIM900 GSM module connect to my AVR Microcontroller. I tested it with FT232 to see transmitting data. First Micro sends AT it will response OK AT OK AT+CMGF=1 OK AT+CMGS="+9893XXXXXX" r...

I found this post on how to encode ascii data to 7-bit GSM character set, how would I decode 7-bit GSM character again (reverse it back to ascii)?

I'm trying to run ussd code via gsm modem to get sim balance. I'm using GsmComm library, ASP.NET Web Form, C#. Below is my code : public string SendUssdRequest2(string request) { comm = Connec...

Since API 21, Google has been adding features to android.telecom in general, especially by implementing more members of TelecomManager and the addition of InCallService. This last one is is suppose...

How can I change the preferred network type with ADB? Example: set Use only GSM, use only WCDMA, use only LTE or automatic.

I m trying to access a website using sim900 GSM module. This is the list of commands AT+CSQ +CSQ: 16,0 OK AT+HTTPINIT OK AT+HTTPPARA="CID",1 OK AT+HTTPPARA="URL","www.google.com" OK AT+...

I'm a newbie to Android. How do I get the GSM signal Strength in terms of percentage (1 - 100%)?

I'm trying to register a custom CharsetProvider to be able to use X-Gsm7Bit encoding. I use https://github.com/OpenSmpp/opensmpp/tree/master/charset/src/main/java/org/smpp/charset provider from Log...

I am trying to detect if a text input field has any character that doesn't belong to the GSM 7 bit alphabet. The table with the characters is here http://www.dreamfabric.com/sms/default_alphabet.ht...

I get +CME ERROR: 10 on setting AT+COPS=1 Below is my terminal AT command output: AT OK AT+CSQ +CSQ: 12,0 OK AT+CMEE=1 OK AT+COPS=? +COPS: (2,"405800","405800","405800"),(1,"40505","40505","...

I'm trying to detect the state of an outgoing call when it starts playing ringback tone. I have tried various approaches for detecting this state. Here are some of them: 1. Using PhoneStateListener...

I created this python script on rpi2, the message goes through, but it is a blank message. Is it a encoding issue? import serial import time from sys import version_info from curses import ascii ...

I have a Raspberry Pi with a SIM900 GSM add-on board connected. I have managed to establish a GPRS connection with pppd by following this guide. (It's for a different GSM module but the steps are t...

I wrote the below Python program to communicate with my D-Link DWM-156 GSM modem. This program wait for incoming calls and as it receive a RING alert, it accepts that call. Fortunately it works fi...

How can I convert a string to correct GSM encoded value to be sent to a mobile operator?

I bought an air200 gsm module and this module won't work properly. in one hand i use the standard at command for sending Unicode SMS, but cant sends Unicode. from the other hand when I send text SM...

Soon I could use a SIP to GSM gateway, because I'll need to make phone calls from Germany to a mobile phone in Czech Republik. Hence, I thought about implementing one. Now, the questions are: Do...

Manufacturer: huawei Model: E3533 Revision: 22.318.27.00.00 IMEI: 353934033009021 +GCAP: +CGSM,+DS,+ES AT+CMGS command work well. OK AT+CMGS="99667788" > test sms +CMGS: 45 OK AT+CMGL="...

I am trying to send a text message from Arduino through a SIM800 GSM module. The message gets to the given number but not in the correct format. It shows "Message format not supported". I am incl...

i'm trying to get info about the neighboring cells my phone can "see" atm. so far so good. i do this like this: telManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);...

I have been using scampers library to send and receive SMS through a GSM modem. It is working pretty much the way I wanted. But the problem I stuck with is I can not issue command like *101# or sim...

Just any old GSM compatible SIM card (bonus for 3G USIM). I presume I need some hardware? Can anyone recommend something cheap for hobbyist, and something more professional? I presume that there ...

Is it possible to use an Android mobile device as a GSM modem with PC? I am developing apps under .net to make send/reieve SMSs and so on. Now I'd like to connect my android devices via USB to my...