Setup manually nTelos Settings for your device. This is nTelos 4G+ APN Settings which is updated.

nTelos APN Settings for Android
nTelos APN Settings for Android

How to setup nTelos APN Settings for Android?
In your Android mobile/Tab Go to Settings > More >Cellular/MObile Network > Access point Names > + ( to add)

nTelos APN Settings for Android

Name : nTelos
APN : nTelos
Proxy : Not Set
Port : Not Set
Username : Not Set
Password : Not Set
Server : Not Set
mmsc : http://mms.ntelospcs.net
mmsproxy : Not Set
mmsport : Not Set
MCC : 310
MNC : 100
Authentication Type : Not Set
APN type : default,supl,mms
APN protocol: Ipv4
APN roaming protocol: Ipv4
Enable/disable APN: APN Enabled
Bearer: Unspecified
MVNO type : None
MVNO Value : Not set

How to setup nTelos APN Settings for iPhone or iPad?
In your iPhone mobile go to Settings> Cellular> Cellular Data Network> APN and fillup the following information.

nTelos APN Settings for iPhone

Cellular Data:
APN: nTelos
Username: Blank
Password: Blank
LTE Setup(Optional):
APN: Blank
Username: Blank
Password: Blank
MMS:
APN: nTelos
Username: blank
Password: blank
MMSC:  http://mms.ntelospcs.net
MMS Proxy: blank
MMS Message Size: 524288
MMS UA Prof URL: blank

APN for Blackberry
Internet APN:
Tap Settings > Network Connections > Mobile Network >APN

Access Point Name (APN) : nTelos
Username : Blank
Password : Blank