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Those symbols indicate which cellular network standard your mobile data connection is currently using, which in turn determines your maximum connection speed. H stands for HSPA, or High Speed Packet Access, with a maximum theoretical speed of 14 Mb/s, or 42 Mb/s with HSDPA (High Speed Downlink Packet Access). H+ stands for HSPA+, or Evolved HSPA, with a ...


It may just be that the APN settings have got lost. If you know what they are for your network, you can go to settings > cellular (assuming US English) and edit the APN in there


Before turning on internet sharing, you should enable your cellular data connection

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