![]() This can help when your network experiences slowdown or is overloaded, or, as we wrote above, you reside in an apartment building with poor reception. Newer phones like the J3 allow users to place calls over WiFi networks as opposed to over their carriers. Here’s an important solution you might want to check, especially if you’re on T-Mobile. Verizon and Sprint do not allow their devices to edit the APN, so you’ll have to skip this step if your phone is on those carriers. Your APN settings should be preset by your carrier, but if you’re on T-Mobile or AT&T and you’ve brought your Galaxy J3 from a different carrier, or you’re using an unlocked model, you’ll want to make sure you can input the correct APN settings into your device you can find these settings on your carrier’s support site. There is one more option you’ll want to check out inside the “Mobile Networks” settings menu: Access Point Names. Finally, for T-Mobile, you’ll want to leave the setting on LTE/3G/2G by default, but again, it’s worth trying all four options to see if you can get a variant to work on your device. The GSM settings for these phones may cause roaming charges to apply. For Verizon and Sprint, you’ll want to leave the setting on Global or Automatic, but it’s worth checking the other two modes to see if you can get a signal on a separate band. So yes, if your phone is on AT&T and isn’t an unlocked model of the J3, you won’t be able to change your network settings. Sprint: Automatic (preferred), LTE/CDMA (alternate), GSM/UMTS (backup).T-Mobile: LTE/3G/2G (preferred), 3G/2G (alternate), 3G only, 2G only.Verizon: Global (preferred), LTE/CDMA (alternate), LTE/GSM/UMTS (backup).The available options will largely depend on your network, but I’ve tried my best to gather the following options for the four major US carriers below: This will display a list of different network modes your phone to which your phone can be set. In the standard settings view, select “Mobile Networks” under “Wireless and Networks.” If you’re using the simplified view, selection “Connections,” followed by “Mobile Networks.” Once you’re on the “Mobile Networks” menu, tap on your “Network mode” setting. Of course, if you’re still experiencing interruptions in your service, keep going through the guide below. In some cases, this might be all that’s needed to reconnect your phone to your carrier. Close the SIM tray, and power your phone back on. Make sure there’s no noticeable damage or dust on the SIM card, and reinsert the card properly. Once you’ve open the SIM slot, remove your SIM card. After the phone is powered off, use your SIM tool (or a small paperclip) to get inside the SIM slot of your phone. Though you could normally use the reboot function included on your Galaxy J3, to help fix your service problems, you should fully power the phone down. So if your device is ever having problems with usability or connectivity, rebooting the device is one of the simplest and quickest fixes for your device. When you reboot your device, your RAM cache is cleared, and a misbehaving app might return to its normal function. Though it’s a bit of a joke among the tech community-”Did you try turning it off and on again?”-rebooting any device experiencing issues or interruptions with day-to-day usage can help fix a number of issues. It’s a cliché, but the first step when you’re experiencing problems with your phone should always be the same: reboot the device. What caused the T-Mobile outage in the US?
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