I can not turn on mobile network - Blackberry Curve 8350i

these are apparently the settings
https://www.fixya.com/support/t26922303-apn_settings_safetynet_wireless_lifeline

APN & data settings

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Access Point Names.
4. If available, tap the T-Mobile US APN.
   • If not available, tap the New APN icon.
   • To reset your APN settings, tap the Menu icon with three dots, then tap Reset to default.
5. Verify and update the following settings for the Data APN:
   • Name: T-Mobile US
   • APN: fast.t-mobile.com
   • Proxy: <Not set>
   • Port: <Not set>
   • Username: <Not set>
   • Password: <Not set>
   • Server: <Not set>
   • MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
   • MMS proxy: <Not set>
   • MMS port: <Not set>
   • MMS protocol: WAP 2.0
   • MCC: 310
   • MNC: 260
   • Authentication type:<Not set>
   • APN type: default,supl,mms
   • APN protocol: IPv6
   • APN roaming protocol: IPv4
   • Enable/disable APN: <greyed out unless there are multiple APN's>
   • Bearer: Unspecified
   • MVNO type: None
   • MVNO value: <Not set>
6. Tap the Menu icon with three dots, then tap Save.
7. Tap the desired APN profile you want to use. The bullet point fills with color next to the APN profile.

Manual network selection

The device detects and registers on wireless networks inside T-Mobile's calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Network operators.
4. Wait while the device populates a list of available networks.
5. Tap the desired network you wish to register on.

Switch 2G / 4G

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Preferred network types.
4. Choose from the following options:
   • LTE/WCDMA/GSM (Auto mode)
   • WCDMA/GSM
   • GSM only

Turn on / off airplane mode

Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.

1. From any screen, swipe down from the top of the screen.
2. Tap the down icon (v), the tap Airplane to turn on or off.

Turn on / off data roaming

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap to turn Data Roaming on or off.

Turn on / off mobile data

1. From any Home screen, tap Apps > Settings > Data usage.
2. Tap to turn Cellular data on or off.

From - https://support.t-mobile.com/docs/DOC-28547


this is the instructions for samsung on how to change settings
https://www.t-mobile.com/support/devices/android/samsung-galaxy-j7/network-apn-and-volte-samsung-galaxy-j7#steps1

APN & data settings

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Access Point Names.
4. If available, tap the T-Mobile US APN.
   • If not available, tap the New APN icon.
   • To reset your APN settings, tap the Menu icon with three dots, then tap Reset to default.
5. Verify and update the following settings for the Data APN:
   • Name: T-Mobile US
   • APN: fast.t-mobile.com
   • Proxy: <Not set>
   • Port: <Not set>
   • Username: <Not set>
   • Password: <Not set>
   • Server: <Not set>
   • MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
   • MMS proxy: <Not set>
   • MMS port: <Not set>
   • MMS protocol: WAP 2.0
   • MCC: 310
   • MNC: 260
   • Authentication type:<Not set>
   • APN type: default,supl,mms
   • APN protocol: IPv6
   • APN roaming protocol: IPv4
   • Enable/disable APN: <greyed out unless there are multiple APN's>
   • Bearer: Unspecified
   • MVNO type: None
   • MVNO value: <Not set>
6. Tap the Menu icon with three dots, then tap Save.
7. Tap the desired APN profile you want to use. The bullet point fills with color next to the APN profile.

Manual network selection

The device detects and registers on wireless networks inside T-Mobile's calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Network operators.
4. Wait while the device populates a list of available networks.
5. Tap the desired network you wish to register on.

Switch 2G / 4G

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Preferred network types.
4. Choose from the following options:
   • LTE/WCDMA/GSM (Auto mode)
   • WCDMA/GSM
   • GSM only

Turn on / off airplane mode

Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.

1. From any screen, swipe down from the top of the screen.
2. Tap the down icon (v), the tap Airplane to turn on or off.

Turn on / off data roaming

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap to turn Data Roaming on or off.

Turn on / off mobile data

1. From any Home screen, tap Apps > Settings >Data usage.
2. Tap to turn Cellular data on or off.

From - https://support.t-mobile.com/docs/DOC-28547 Network APN Kyocera DuraForce XD

APN & data settings

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Access Point Names.
4. If available, tap the T-Mobile US APN.
   • If not available, tap the New APN icon.
   • To reset your APN settings, tap the Menu icon with three dots, then tap Reset to default.
5. Verify and update the following settings for the Data APN:
   • Name: T-Mobile US
   • APN: fast.t-mobile.com
   • Proxy: <Not set>
   • Port: <Not set>
   • Username: <Not set>
   • Password: <Not set>
   • Server: <Not set>
   • MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
   • MMS proxy: <Not set>
   • MMS port: <Not set>
   • MMS protocol: WAP 2.0
   • MCC: 310
   • MNC: 260
   • Authentication type: <Not set>
   • APN type: default,supl,mms
   • APN protocol: IPv6
   • APN roaming protocol: IPv4
   • Enable/disable APN: <greyed out unless there are multiple APN's>
   • Bearer: Unspecified
   • MVNO type: None
   • MVNO value: <Not set>
6. Tap the Menu icon with three dots, then tap Save.
7. Tap the desired APN profile you want to use. The bullet point fills with color next to the APN profile.

Manual network selection

The device detects and registers on wireless networks inside T-Mobile's calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Network operators.
4. Wait while the device populates a list of available networks.
5. Tap the desired network you wish to register on.

Switch 2G / 4G

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap Preferred network types.
4. Choose from the following options:
   • LTE/WCDMA/GSM (Auto mode)
   • WCDMA/GSM
   • GSM only

Turn on / off airplane mode

Airplane mode turns off wireless connections. This allows app and menu use, but prevents voice or Internet use.

1. From any screen, swipe down from the top of the screen.
2. Tap the down icon (v), the tap Airplane to turn on or off.

Turn on / off data roaming

1. From any Home screen, tap Apps.
2. Tap Settings > More > Cellular networks.
3. Tap to turn Data Roaming on or off.

Turn on / off mobile data

1. From any Home screen, tap Apps > Settings > Data usage.
2. Tap to turn Cellular data on or off.

From - https://support.t-mobile.com/docs/DOC-28547

If you need further help, I’m available over the phone at https://www.6ya.com/expert/daniel_a4640839dbb7ec58

try checking if airplane mode is off Tap Settings > Network Connections > Mobile Network.Set the Mobile Network switch to On. After you finish: To turn off your connection to the mobile network, set the Mobile Network switch to Off.

Check to make sure phone is registering in network. Check a network is selected. Try the following.
APN & data settings To set the Access Point Name (APN) and turn on data settings, follow these steps:

1. From any Home screen, tap the Menu key.
2. Tap Settings.
3. Tap the Connections tab.
4. Tap More networks.
5. Tap Mobile networks.
6. Tap Access Point Names.
7. If available, tap the T-Mobile US APN (the bullet point fills with green). If not available, tap the Menu key, and then tap New APN.
   Note: To reset your APN settings, tap the Menu key and then tap Reset to default.
8. Verify and update the following settings for the Data APN:
   • Name: T-Mobile US LTE
   • APN: fast.t-mobile.com
   • Proxy: <Not set>
   • Port: <Not set>
   • Username: <Not set>
   • Password: <Not set>
   • Server: <Not set>
   • MMSC: http://mms.msg.eng.t-mobile.com/mms/wapenc
   • MMS proxy: <Not set>
   • MMS port: <Not set>
   • MMS protocol: WAP 2.0
   • MCC: 310
   • MNC: 260
   • Authentication type: <Not set>
   • APN type: <Not set> OR Internet+MMS
   • APN protocol: IPv4/IPv6
   • APN roaming protocol: IPv4
   • Enable/disable APN: <greyed out unless there are multiple APN's>
   • Bearer: Unspecified
9. Tap the Menu key.
10. Tap Save.
11. Tap the desired APN profile you want to use. The bullet point fills with green next to the APN profile.

Manual network selection To manually select the wireless network the device connects to, follow these steps:

1. From any Home screen, tap the Menu key.
2. Tap Settings.
3. Tap the Connections tab.
4. Tap More networks.
5. Tap Mobile networks.
6. Tap Network operators.
7. Tap Search now.

The device detects and registers on wireless networks inside T-Mobile's calling area, but roaming networks are usually restricted to T-Mobile SIM cards. You can manually select a network only in areas where T-Mobile does not own GSM spectrum.


Switch 2G / 4G To change the band between 2G and 4G, follow these steps:

1. From any Home screen, tap the Menu key.
2. Tap Settings.
3. Tap the Connections tab.
4. Tap More networks.
5. Tap Mobile networks.
6. Tap Network mode.
7. Tap one of the following desired band settings:
   • GSM / WCDMA (auto connect)
   • GSM only (2G only setting)
   • WCDMA only

Turn on / off Airplane mode Airplane mode turns off wireless connections. This allows you to use apps and menus, but not make calls or use the internet.

To turn on or turn off airplane mode, follow these steps:

1. From any Home screen, tap the Menu key.
2. Tap Settings.
3. Tap the Connections tab.
4. Tap More networks.
5. To turn on, tap Airplane mode to select the check box. Tap OK.
6. To turn off, tap Airplane mode to clear the check box. Tap OK.

There are two ways to turn off emergency
1.You mobile phone receives weak signal from near tower so try to Switch off your mobile,wait few seconds and switch on.
2.Your mobile is locked to particular network provider.
If your problem persists after switch on your phone means definitely your mobile phone is restricted by some network so try to unlock your mobile phone.You can unlock your mobile phone using network unlock code.It's the best way to unlock your phone.If you need an unlock code for your HTC HD7 phone visit MobileUnlockSolutions.com I hope it will be very useful to you.

One trick is to go into settings and go into mobile networks and turn off your mobile network connection. Then put the phone into airplane mode. Give it 30 seconds then take it out of airplane mode and turn on mobile network if it doesn't automatically. Also just try rebooting the phone.

Use this address to get your settings info:
http://www.flexispy.com/Mobile%20APN%20Setting%20to%20use%20GPRS.htm

Connecting to the Internet When you turn your phone on for the first time (with the SIM card inserted), it should connect automatically to your mobile operator's data service. You can start browsing the web straight away.
Checking your current data connection settings Your phone has been set to connect automatically to the Internet through your mobile operator's data service. If you don't get a connection automatically, check your network connection settings.

1. From the main Home screen, press MENU, and then tap Settings > Wireless controls.
2. Make sure that Mobile network is turned on.
3. Tap Mobile network settings, and then check the following:
   • Automatic setup is turned on.
   • The name of your mobile operator is displayed in the Network operators item.
   • The right mobile network is displayed in the Access point names item. If it's not the right network, see your phone's user guide to find out how to add a new access point.

Turning the data connection off You can turn off the data connection to help optimize your phone's battery life or to save money on data charges.

1. From the main Home screen, press MENU, and then tap Settings > Wireless controls.
2. Turn the data connection off by tapping the Off/On switch of Mobile network. (Tap this switch back on if you want to connect to the Internet again.)

   

Hi,
to turn on wireless network connection you should launch windows mobility center,follows steps below

• Use the shortcut key <windows key > + <X>
• windows mobility center will open (start->control panel->windows mobility center)

in wireless network segment click turn ON button

Yes, the Bold 9700 will use wi-fi in preference to the mobile network whenever both are available. I had one for a month, it was my primary means of internet access and I didn't get charged a penny for any data usage. I used it on both my home wireless network and in many public hotspots.

In any case, it's easy to check: the top of the screen will show the wi-fi logo in white when connected and greyed out when wi-fi is switched on but not connected.

I hope that this answers your question, if so then please take a moment to rate my reply. If not, then please add a comment and I shall expand upon my answer to suit your needs.