If you have 4G signal issue 4G Mode | Ping Master is the right app you must try.

4G Mode | Ping Master app will redirect to android advanced system radio settings to lock your 4G / LTE or 3G / WCDMA signal.
Your device will run only in single signal even signal in your area is poor without automatic switching.

4G Mode | Ping Master built in Ping Master you can perform asynchronous ping up to 100 burst ping to any host or IP.

With 4G Mode | Ping Master you can view your connection details such as IP address realtime internet speed and realtime ping.

4G Mode not have service in background so it safe for your device resource.

4G Mode maybe not work in some android device because some device vendor accessing system limitation.

If you have any issue GSM service please switch ON/OFF airplane mode to reset connection and disable changed setting to default.