Calls and messages without GSM or WiFi, or school disaster

Calls and messages without GSM or WiFi

As you know, that two phones to make contact, we need a cellular network or WiFi internet connection. But what if a natural disaster, when mobile networks and the Internet no longer exists? Or maybe we want to communicate with phones connected directly to the school.
Fortunately there P2P communication solutions, ie from phone to phone, without needing cellular network connection (2G, 3G, 4G) or internet. The solution is Wi-Fi Direct, which connects phones at each other. The only downside would be working radius, which is dependent on the power transmitting and receiving mobile (approx 100m).
However, distance does not bother us when we want to use the connection in a small area such as at school, at work, in a place affected by earthquake, flood, etc.

How can communicate directly phones?

Connection method consists in using an application that will use Wi-Fi Direct or Wi-Fi network existence (when coverage may be higher).

What we need?

1. Wi-Fi Direct has about every Android phone
2. app Free Wi-Fi Talkie (Play store)

How to connect?

1. First connect phones via Wi-Fi Direct (see the tutorial). To eliminate any inconvenience, above all we disconnect from Wi-Fi networks.
2. Once you've connected phones via Wi-Fi Direct, we open the app on both phones and they will automatically see, being on the same network.
3. The application goes through Wi-Fi network, provided that the two phones to be connected to the same router.

What lies ahead?

If we look into the future we see that wifi coverage will increase with the introduction of standard AY 802.11, 60 Ghz frequency of which will reach up to 500m - 1Km with a bandwidth of 20-40 Gbps.
Right now we have in mobile technology LTE DirectWhich could allow us to connect phones together over great distances, but unfortunately this kind of irritated technology providers who see how faltering, that would democratize connections.

What does it do Talkie Free Wi-Fi?

This application allows us to call, to be hailed, to send / receive messages and to send / receive files from phones that are connected, or to phones in the same wifi network, to which we are connected. Exactly is a full service communications, but without GSM or internet provider.
For fast transfer of files between two phones via Wi-Fi Direct, we an interesting tutorial mobile-phone transfer, and other equally interesting tutorial, transfer by Wi-Fi Direct between PC and phone.

What we can use Free Wi-Fi Talkie?

1. At school (for children)
2. In areas of earthquake / flood
3. In areas where no communications network

How can we make a network with greater coverage area for Wi-Fi Free Talkie?

We can build a Wi-Fi network with multiple access points and a central router (for single DHCP server). This network can scale as much as we want. It can be a kind of network installation / removal fast, which may take place in case of natural disaster area where everyone can connect and communicate with each other and with the authorities.
If you are passionate about this kind of guerilla methods of communication, recommend and Push To Talk tutorial, a kind of internet Talkie Walkie.

Calls and messages without GSM or WiFi - Video Tutorial

Related Tutorials

About Cristian Cismaru

I love everything related to IT & C, I like to share the experience and information that we accumulate every day.
Learn as you learn!


  1. Interestingly, I suspect that would be fully functional and between two vehicles in motion with the condition not to let off too much. Interestingly enough roaming for vehicles without radio station

  2. A better alternative is Serval Mesh. There Android app. It works on the same principle but is easier to configure. On their website you will find a list of natural disasters, where they offered their support.
    Such projects are always welcome.
    Good article, I would not have thought so combination!

  3. good idea so you can communicate in school or somewhere where you do not have good signal if the person across xe in action. and yes I for one would like to do and that tutorial.

    • Caline and you come with your Klingon language here. What understand from what you wrote: good signal or signal correctly is good or better. Learn Romanian language pal

      • "Caline and you come with your language Klingon ... Learn Romanian language buddy" ...
        You ... you ....
        I think we should more you learn and you !!!

    • That's not to say the error between the 2 words written by you. "Radius of action". See you forgot to use a "for" between the 2 words

      • May vadca kid you not have another job. veziti sf better your sites. and do not always useful cv comment oftopic oddball. e last time put you in mind. you can do on the Romanian profu until you can not. and so I can correct them all. and better respect the work of others and not to be commented comment

        • I have all respect for what Adrian Cristi and laying a long tutorials. Watching them since they appeared. But frankly your comments are more interesting as their tutorials. I am convinced that together by me and others laugh your comments. Even a VIDEOTUTORIAL you expect to hear you and your talk.

  4. Hi Cris some time I face a problema.O SENIOR wants to use a phone with android. The problem is that it pressed the home button several times during the call and thought it was closed. This has increased the bill. Do you think there is any solution to this problem.
    The phone is Vodafone Smart Android version is 4 and 4.2.2.

  5. Cristi, God give you good health! Many thanks for the effort and hard work ... watch many years, and still discover many ... .lucrurile are explained clearly and to the point ... .Multumiri yourself and team! Par.

  6. Mata Horia said

    How it fits "without GSM or WiFi" the title "What we need: application Talkie Free Wi-Fi" and "Wi-Fi Direct has about any phone"? As in Hamlet: "To be or not to be"!

    • Adrian Gudus said

      When state "without WiFi" (as explained in the tutorial) refers to the fact that you've intermediaries need not be connected to a GSM or WiFi.
      Make the difference between WiFi network and WiFi module using the phone.
      WiFi module have it anyway in your phone, ready for use. Connecting to a WiFi network involves using WiFi module of the device, there is a WiFi network connected to the Internet, knowing this password to log in, enter your password to connect to that network and connect

  7. pop vasile said

    Cristi, while a new tutorial mess ???

  8. Hello.

    Sorry for off-topic.
    I have a question. If I give command oneplus3 in USA and somebody brings it, it will be compatible with calling cards in romania, 3g, 4g, or .., voda ... etc? Or rather, there is a difference besides price if you bring him in order for states or europe on the site?

    Thank you very much!

    • Zicu careful what you order from america (mobile) in particular ... .in first to be compatible with GSM technology .... (GSM (Global System for Mobile Communications, is a standard developed by the European Telecommunications Standards Institute Americans have different technology ...... CDMA if I'm not mistaken ... you give money for nothing ... better to order it in Europe.

  9. Something different and interesting. However, in situations like this it would not hurt to have some handy transceiver stations. Those can cause a few km, while the distance wifi phones do not believe that exceed 100 - 150 m in the best case possible.

  10. CER a little help, I want a fanny pack I can put a CD CEVA esternal HDD, DV ETC. A LINC PLEASE.

  11. Please help me with some advice, I do not know what to buy (for games) thereof:
    1. ASUS Z170-A Socket LGA1151 with Intel Core i7-6700K 4GHz Skylake 8MB
    2. Asus X99 LGA2011-ATX II-DELUXE with Intel Core i3 7-6800-Core 3.4K 6GHz
    I do not really understand why X99 has 2 internet jacks?!?

    • Well first confguratie as the second motherboard does not support processor that is lga2011. The plugs are second in case it breaks one's x99.

      • Marius,
        I did not understand ... the first configuration has LGA1151 2-2011 he has LGA3 ... first processor configuration is mentioned ... the second processor configuration has them ... What are you talking about ???

  12. Hello Cristi, tell me please how find out exactly how often have you remain my laptop (for them not physically write in cpuz I do not say) and if we 2 slots rami of which 1 slot is occupied with a pleasant 2 rami and I have one free, is required to put maximum 2 like to see them (I read somewhere CICA) or to put and 4 or 8? On my plate write 2Gb 1Rx16 PC3L-12800S -11-12-C3. Dell inspiron laptop is model 3537. Please do yourself a little more time and answer me I do not know what the hell to buy. Thank you.

  13. I apologize that this tutorial is not related to my comment. It can ajuata anyone any advice? Phone card I have a folder containing movies, how I make a shortcut to this folder to be on the phone? Is there any software?

    • I've been interested and found: Open Android Market and search for "File Manager". Choose the file manager you want to install. There are a number of file managers that allow you to create shortcuts to system folders, movies, pictures; including "Astro File Manager", "OI File Manager" and "ES File Explorer."

  14. marinescu77 said

    good hard !!! MAESTRE're loud!

  15. Iulian said

    A very good application but it should be specified that the application does not work with Wi-Fi off. As you said in the tutorial, you do not use mobile or Wi-Fi networks, but it needs to be turned on. I tried this with two OnePlus One phones and Samsung S5 Mini.

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