Sure F25 4G LTE / WIFI (Android unlocked)

Rated 4.00 out of 5 based on 3 customer ratings
(3 customer reviews)


The Sure F25 is a network radio based on an android smartphone with dedicated PTT button. It works with 2G, 3G, 4G/LTE and WiFi. Just install Zello, or Team Speak 3 from Google Play store, and you have a Global Coverage Walkie-Talkie Radio.

Check the Sure F25 PTT4U Professional version

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This network radio is fully compatible with the International Radio Network (IRN) and with the new Echolink for Android.

Is this still hamradio? Read this article.

Are you looking for two way radios? You just found the best radio shop!
What if you could have a walkie talkie app on your phone? Let us introduce you the best walkie talkie app ever made: Zello is walkie talkie app for android, iphone, IOS and there is also zello for PC.

This radio-like smartphone has a PTT that will key up the transmitter. As far as you have a dataplan or a WiFi connection, then you have yourself a two way walkie talkie app with worldwide range.

First, download the Zello app. Then, just press your zello PTT button and you will be heard!

You can have 1-to-1 private communications, or 1-to-many communications on a private zello channel. There are also many public zello channels, with different purposes, around the world.

Some hamradio RF networks are connected to Zello private channels. With such, if you are a licensed ham, then you can stay online with zello and have QSO’s with your ham friends. There are many zellos worldwide. Would you like to become one? 🙂

Welcome to the Zello PTT walkie talkie world!

TPG+G Screen
Resolution QVGA
GSM/WCDMA/FDD bands2G :GSM:850/900/1800/1900  ;
Network SupportSupport GSM/GPRS/EDGE,TD-SCDMA,WCDMA,TDD-LTE,FDD-LTEIn the U.S. only AT&T supports this network radio.
MemoryDDR3  1G RAM+8G ROM
SD CardUp to 32GB
CameraFront 2.0mp(SW 5mp), Rear 5.0MP(SW 8.0MP)
P-sensor and Light SensorSupport
3D SesorSupport
GPS +BeidouSupport
WIFI2.4G support 802.11
IOMicro 5 Pin
DCNot Support
EarphoneSupport 3.5mm Earphone
LanguageInputAndroid Keyboard
VideoVideoSupport MP4,3GP,AVI
AudioSupport MP3,MID,AMR
FMSupport FM and network FM
Online TVSupport
BatteryBattery3500 mah


Package Contains:

1X phone F25

1 x 3500mAh battery

1 x USB cable

1 x Eternal GSM Antenna

1 x Charger

1 x User manual

3 reviews for Sure F25 4G LTE / WIFI (Android unlocked)

  1. Rated 5 out of 5


    A good video on the Sure F series can be found here:

  2. Rated 5 out of 5

    Barry (verified owner)

    As an Amateur Radio operator, I always interested in new technology in radio services. I have been playing with I.P. Radios for months now using the Team Speak App on my I_Pad. The App work great, but does not give you the Hand Held experience of the F-25. I have only had the radio for 3 days now, but can already tell I will really enjoy this product. It works much better then a Hot Spot and Digital hand held radio, and is more mobile. Tether to you phone, and go. I am retired now, and have more time for Ham Radio. This year alone, I have chatted with my friend back home from Jamaica, Domican Republic and St. Lucia, using I.P. Radio. I recommend this radio to Ham Radio operator that wishes to try this new digital mode. The price is less then a Handie.

    Barry D. Brousseau C.E.T.
    Va3SLD/r Repeater 147.360 Pl 131.8 Guelph,Ontario

  3. Rated 2 out of 5

    Bob (verified owner)

    I bought this because it is advertised as a 4g LTE. I am in a strong 4g area, and this phone does not get 4g. I was very disappointed. I will not continue cell service with it, guess I will just use it for wifi.

    • admin

      Which network provider are you using? Not all providers in US use the 4G frequency bands that this device features.

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