Datasheet

My FONA won't turn on/respond! Or it acts flakey and auto-shuts off sometimes!

We've noticed a lot of problems that are 'weird' that are a results of using batteries with the wrong polarity.

All batteries from adafruit have the right wire colors/polarity for the FONA

Batteries not from Adafruit are not guaranteed to have the right pinout! Using the wrong pinout may damage the

FONA and/or make it act 'odd'!

FONA 800/808 requires a 2G SIM, does it work with a dual 2G-3G SIM?

That will work fine, as long as the SIM can register to the 2G network at all, it is acceptable to use

Are you sure I can't use ATT for 2G service? I'm in a T-Mobile cold spot

The AT&T GSM network is going to be live until January 2017. If you're reading this and it's 2017, you're outta luck. If

not, you can try to get an AT&T SIM activated to the 2G GSM network but its not going to do that by default. You'll

have to call up or talk to an AT&T rep and it may not go so well because they really don't want people to use their

GSM network.

You can also call up T-Mobile and say you can't get connected consistently - they may send you a free signal

booster

Check out this handy map to see T-Mobile's coverage map in the USA

How long can FONA last on my battery?

We haven't done extensive testing with FONA but from preliminary reports, the FONA draws about 20-25mA while

running, up to 200mA+ while actually making a call/sending/receiving data, and has very small spikes of up to 2A.

The spikes are short and are absorbed by the onboard capacitors.

A 1200mAh battery can run the FONA on 'standby' for a day or two.

How do I set the Real Time Clock on the FONA SIM?

Please see this forum post!

I'm using a FONA 808 and the GPS commands aren't working

The FONA 808 has two versions, due to a revision of the module itself. Version 1 has two barcodes on the front and

is part #S2-10606-Z1F01. Version 2 has a QR code on the front and is part #S2-10606-Z1F02. V2 has a newer/better

chipset (MT3337 instead of MT3336) but the commandset has changed. Which is annoying but adaptable!

If you are using V1, use this GPS command document for how to interact with the GPS subsystem

If you are using V2, use this GNSS command document instead.

How do I switch between SMS storage on SIM and in internal FLASH?

You can switch between the storage locations by changing the FONA_PREF_SMS_STORAGE definition in the

Adafruit_FONA.h library file. The definition "SM" selects the SIM, and the definition "ME" selects FLASH.